VWR Avantor® Biopharmaceutical Products for Equipment and Instruments

Sl No.DescriptionPack SizeCat No.Enquire
14*4Frozen Rack; SUS304VWRA471-1263Enquire
24*4Frozen Rack; SUS201VWRA471-1264Enquire
34*4Frozen Rack; SUS304VWRA471-1265Enquire
45*3Frozen Rack; SUS201VWRA471-1266Enquire
55*3Frozen Rack; SUS304VWRA471-1267Enquire
65*4Frozen Rack; SUS304VWRA471-1268Enquire
75*4Frozen Rack; SUS201VWRA471-1269Enquire
85*4Frozen Rack; SUS304VWRA471-1270Enquire
95*5Frozen Rack; SUS304VWRA471-1271Enquire
105*5Frozen Rack; SUS201VWRA471-1272Enquire
115*5Frozen Rack; SUS304VWRA471-1273Enquire
12100L -86 °C Upright ULT FreezerVWRA471-1274Enquire
13388L -86 °C Upright ULT FreezerVWRA471-1275Enquire
14490L -86 °C Upright ULT FreezerVWRA471-1276Enquire
15578L -86 °C Upright ULT FreezerVWRA471-1277Enquire
16578L -86 °C Upright ULT Freezer Double coolingVWRA471-1278Enquire
17728L -86 °C Upright ULT FreezerVWRA471-1279Enquire
18728L -86 °C Upright ULT Freezer Double coolingVWRA471-1280Enquire
19729L -86 °C Upright ULT Freezer Smart FrequencyVWRA471-1281Enquire
20828L -86 °C Upright ULT FreezerVWRA471-1282Enquire
21829L -86 °C Upright ULT Freezer Smart FrequencyVWRA471-1283Enquire
22959L -86 °C Upright ULT Freezer Smart FrequencyVWRA471-1284Enquire
23CO2 Back up, temp range -40 °C~- 70 °C, built-in versionVWRA471-1285Enquire
24LN2 Back up, temp range -90 °C~- 135 °CVWRA471-1286Enquire
25CO2 Back up, temp range -40 °C~- 70 °C, free standing versionVWRA471-1287Enquire
26LN2 Back up, temp range -90 °C~- 135 °C, free standing versionVWRA471-1288Enquire
27Electromagnetic lockVWRA471-1289Enquire
28Fingerprint lockVWRA471-1290Enquire
29Shelf suitable for DW-86L338J/388JVWRA471-1291Enquire
30Shelf suitable for DW-86L486E/490JVWRA471-1292Enquire
31Shelf suitable for DW-86L578J/578S/578S-TVWRA471-1293Enquire
32Shelf suitable for DW-86L628EVWRA471-1294Enquire
33Shelf suitable for DW-86L959W/959BP/959BP-TVWRA471-1295Enquire
34Shelf suitable for DW-86L728J/729BP-TVWRA471-1296Enquire
35Shelf suitable for DW-86L828J/828W/829BP/829BP-TVWRA471-1297Enquire
36Circular chart temperature recorderVWRA471-1298Enquire
37Circular chart recorder paperVWRA471-1262Enquire
Sl No.DescriptionPack SizeCat No.
1DUO SAS SUPER 360 FOR PETRI DISHES1 itemPBIB90718Enquire
2DUO SAS SUPER 360 FOR CONTACT PLATES1 itemPBIB24584-AEnquire
3ALUMINIUM CASE SAS SUPER 100/1801 itemPBIB20153Enquire
4ALUMINIUM CASE FOR DUO SAS SUPER 3601 itemPBIB86751Enquire
5SAS STAINLESS STEEL PETRI HEAD+ADAP1 itemPBIB19119Enquire
6SAS STAINLESS STEEL HEAD FOR PETRI 91 itemPBIB23236Enquire
7SAS ALUMINIUM PETRI HEAD+ADAPTOR1 itemPBIB19117Enquire
8SAS STAINLESS STEEL HEAD FOR CONTACT1 itemPBIB15503Enquire
9SAS STAINLESS STEEL ADAPTER FOR PETR1 itemPBIB42804Enquire
10SAS ALUMINIUM HEAD FOR 90 MM PETRI1 itemPBIB34494Enquire
11DUO SOFT CARRYNG CASE FOR SAS SUPER1 itemPBIB25094Enquire
12SAS STERILE DAILYHEAD FOR CONTACT PL40 itemsPBIB86996.AEnquire
13SAS STERILE DAILY HEAD FOR PETRI 9040 itemsPBIB91214.AEnquire
14SAS ALUMINIUM HEAD FOR CONTACT PLATE1 itemPBIB15931Enquire
15SOFT CARRYING CASE FOR SAS1 itemPBIB18143Enquire
16SAS SUPER ISOLATOR 100 FOR CONTACT P1 itemPBIB43216-BEnquire
17SAS SUPER ISOLATOR 180 FOR CONTACT P1 itemPBIB43217-BEnquire
18SAS SUPER ISOLATOR 100 FOR PETRI DIS1 itemPBIB43218-BEnquire
19SAS SUPER ISOLATOR 180 FOR PETRI DIS1 itemPBIB43219-BEnquire
20ASPIRATING CHAMBER FOR CONTACT PLATE1 itemPBIB87085Enquire
21ASPIRATING CHAMBER FOR 90 MM PETRI1 itemPBIB88826Enquire
22SAS SUPER PINOCCHIO II FOR CONTACT P1 itemPBIB39089Enquire
23SAS SUPER PINOCCHIO II FOR PETRI DIS1 itemPBIB35026Enquire
24SAS PINOCCHIO FOR CONTACT - CALIBRA1 itemPBIB89218Enquire
25IQ-OQ MANUAL FOR SAS SUPER ISOLAT1 itemPBIB20096Enquire
26SAS PINOCCHIO FOR PETRI - CALIBRATE1 itemPBIB89219Enquire
27IQ OQ FOR SAS SUPER ISO 100 AND 1801 itemPBIB20094Enquire
28MANUAL IQ-OQ FOR DUO SAS SUPER 3601 itemPBIB20095Enquire
29REMOTE CONTROL FOR SAS DUO/ISOLATOR1 itemPBIB18950-AEnquire
30SAS-HOLDER TABLE AND WALL STAINLES S1 itemPBIB20914Enquire
31VALIDATED PINOCCHIO FLOW-METER1 itemPBIB32949Enquire
32SAS ISOLATOR EXTENSION CABLE 3MT1 itemPBIB87898Enquire
33REMOTE CONTROL FOR SAS SUPER ISO1 itemPBIB89170Enquire
34SAS SOFTWARE FOR SAS SUPER ISO1 itemPBIB89320Enquire
35BATTERY CHARGER FOR SAS SUPER ISO1 itemPBIB89130Enquire
36SAS ALUMINIUM ADAPTER FOR PETRI1 itemPBIB87491Enquire
37SAS SOFTWARE FOR DUO SAS AND ISOLATO1 itemPBIB89996.BEnquire
38SAS SUPER AND ISO-USB BATTERY CHARGER1 itemPBIB78636Enquire
39BATTERY PACK SAS SUPER 100/180 & ISO USB1 itemPBIB18200Enquire
40FLOOR TRIPOD FOR SAS AIR SAMPLERS1 itemPBIB5215.PEnquire
41FLOW METER FOR SAS SUPER PINOCCHIOII1 itemPBIB78783Enquire
42SAS SUPER ISO 180 USB CONTACT 55MM1 itemPBIB86835Enquire
43SAS SUPER ISO 100 USB CONTACT 55MM1 itemPBIB86280Enquire
44SAS SUPER ISO 180 USB PETRI 90 MM1 itemPBIB90721Enquire
45SAS SUPER ISO 100 USB PETRI 90 MM1 itemPBIB90722Enquire
46SAS SUPER IAQ TIPO PETRI1 itemPBIB90715Enquire
47SAS PINOCCHIO CR PETRI DISHES1 itemPBIB35026INOXEnquire
48SAS PINOCCHIO CR CONTACT PLATES1 itemPBIB39089INOXEnquire
49SAS PINOCCHIO CR CONTACT PLATES CALIB.1 itemPBIB89218INOXEnquire
50SAS PINOCCHIO CR FOR PETRI DISHES CALIB.1 itemPBIB89219INOXEnquire
51SAS SUPER 100 PETRI 90MM1 itemPBIB90716Enquire
52SAS SUPER 180 PETRI 90MM1 itemPBIB90717Enquire
Personal Micro Centrifuge, Speed 6000 RPM, VORTEXERS
Sl No.DescriptionPack SizeCat No.
110 mL AdapterVWRA521-329684219900Enquire
28 mL AdapterVWRA521-329784219900Enquire
36 mL AdapterVWRA521-329884219900Enquire
46 mL AdapterVWRA521-329984219900Enquire
56 mL AdapterVWRA521-330084219900Enquire
65 mL AdapterVWRA521-330184219900Enquire
7Mini Vortexer,Fix Speed 3500 RPMVWRA444-114684798200Enquire
8Digital Vortex Mixer , Speed 4200 RPM, with conical & round disk attachmentVWRA444-114784798200Enquire
9Analog Vortex Mixer, Speed 2800 RPM, with conical & round disk attachmentVWRA444-114884798200Enquire
10Mini Vortexer, Speed 4500 RPMVWRA444-114984798200Enquire
11Microplate Attachment for One 96 Well Plate (with Base)VWRA444-115084799090Enquire
12Tube Attachment for 20 Tubes (with Base) 20 X 1.5/2.0 mLVWRA444-115184799090Enquire
13Round Disk Attachment (with Base)VWRA444-115284799090Enquire
14250 mL Flask Holder Attachment (with Base)VWRA444-115384799090Enquire
15Digital Multitube Vortex Supplied with Attachments , Speed 2500 RPM along with AttachmentsVWRA444-115484798200Enquire
16Attachment for 60 X 7 mL TubesVWRA444-115584799090Enquire
17Attachment for 45 X 15 mL TubesVWRA444-115684799090Enquire
18Attachment for 18 X 50 mL TubesVWRA444-115784799090Enquire
19Attachment for 6 X 250 mL FlasksVWRA444-115884799090Enquire
20Attachment for 72 X 1.5/2.0 mL TubesVWRA444-115984799090Enquire
21Foam Attachment (Horizontal-50mL Tube) for Quechers TestVWRA444-116084799090Enquire
22Tube Roller, Fix Speed 30 RPM with 4 Rollers VWRA444-1161 84798200Enquire
23Digital Tube Roller, Speed 80 RPM with 6 Rollers VWRA444-1162 84798200Enquire
DIGITAL DISK TUBE ROTATOR WITH A MICROPROCESSOR & BRUSHLESS MOTOR
Sl No.DescriptionPack SizeCat No.
1Disk: 12 X 50 mL Tubes with 12 pcs of C50 clampsVWRA444-116684799090Enquire
250 mL Tube ClampVWRA444-116784799090Enquire
3Disk: 24 X 15 mL Tubes with 24 pcs of C15 clampsVWRA444-116884799090Enquire
415 mL Tube ClampVWRA444-116984799090Enquire
5Disk: 44 X 2mL TubesVWRA444-117084799090Enquire
65 mL /2 mL Tube ClampVWRA444-117184799090Enquire
7Digital Plate Rotator, Speed 80 RPMVWRA444-117884798200Enquire
8Plate: 16 X 50 mL TubesVWRA444-118184799090Enquire
950 mL Tube ClampVWRA444-118284799090Enquire
1035 X 15 mL TubesVWRA444-118384799090Enquire
1115 mL Tube ClampVWRA444-118484799090Enquire
1255 X 2 mL / 5 mL TubesVWRA444-118584799090Enquire
132 mL / 5 mL Tube ClampVWRA444-118684799090Enquire
14Digital Disc Rotator, Speed 80 RPMVWRA521-277984798200Enquire
HOT PLATE MAGNETIC STIRRER, OVERHEAD STIRRERS
Sl No.DescriptionPack SizeCat No.
1Motor Less Magnetic Stirrer , Speed 1500 RPM, 800mL CapacityVWRA444-118984798200Enquire
2Motor Less Magnetic Stirrer , Speed 1200 RPM, 4 X 400mL CapacityVWRA444-119184798200Enquire
3Analog Magnetic Stirrer , Speed 2200 RPM, 10 Ltr CapacityVWRA444-119584798200Enquire
4Carrying PlateVWRA444-119684799090Enquire
5Quarter Reaction Block- 4 Position X 20 mL Suitable with Carrying PlateVWRA444-119784799090Enquire
6Quarter Reaction Block- 4 Position X 30 mL Suitable with Carrying PlateVWRA444-119884799090Enquire
7Quarter Reaction Block- 7 Position X 16 mL Suitable with Carrying PlateVWRA444-119984799090Enquire
8Quarter Reaction Block - 10 Position X 8 mL Suitable with Carrying PlateVWRA444-120084799090Enquire
9Quarter Reaction Block- 12 Position X 4 mL Suitable with Carrying PlateVWRA444-120184799090Enquire
10500mL Reaction Block - (Also Available for Smaller Reaction Vessels)VWRA444-120284799090Enquire
11Support Stand with Boss Head Clamp for Pt 1000 Sensor ProbeVWRA444-120384799090Enquire
12Pt 1000 SensorVWRA444-120484799090Enquire
13Digital Hot Plate Stirrer with Ceramic Plate, Speed 2200 RPM, Heating 350 °C, 20 Ltr. capacity, 3 Heating ModesVWRA444-120584798200Enquire
14Digital Hot Plate Stirrer with Ceramic Plate, Speed 2200 RPM, Heating 550 °C, 20 Ltr. capacity, 3 Heating ModesVWRA444-120684798200Enquire
155 Position Hot Plate Stirrer, 1500 RPM, 400 mL Per Position Capacity, Heating 120°CVWRA444-121284798200Enquire
1610 Position Hot Plate Stirrer, 1500 RPM, 400 mL Per Position Capacity, Heating 120°CVWRA444-121384798200Enquire
1715 Position Hot Plate Stirrer, 1500 RPM, 400 mL Per Position Capacity, Heating 120°CVWRA444-121484798200Enquire
18High Capacity Magnetic Stirrer, 50 Ltr Capacity, 600 RPMVWRA444-121684798200Enquire
19Support FrameVWRA444-121784799090Enquire
20Stir Bar Length 80 mmVWRA444-121884799090Enquire
21High Capacity Magnetic Stirrer, 200 Ltr Capacity, 600 RPMVWRA444-121984798200Enquire
22Stir Bar Length 100 mmVWRA444-122084799090Enquire
23Digital Hot Plate Stirrer with Ceramic Coating , Speed 2200 RPM, Heating 320°C, 10 Ltr CapacityVWRA521-278284798200Enquire
24Overhead Stirrer 8 Ncm, 10 L Capacity, Speed 2,000 RPM, 4,000 MpasVWRA441-051084798200Enquire
25Overhead Stirrer 15 Ncm, 20 L Capacity, Speed 1,000 RPM, 8,000 MpasVWRA441-051184798200Enquire
26Overhead Stirrer 50 Ncm, 50 L Capacity, Speed 2,000 RPM, 30,000 MpasVWRA441-051284798200Enquire
27Overhead Stirrer 75 Ncm, 75 L Capacity, Speed 2,000 RPM, 50,000 MpasVWRA441-051384798200Enquire
28Overhead Stirrer 100 Ncm, 100 L Capacity, Speed 1,300 RPM, 70,000 MpasVWRA441-051484798200Enquire
29Overhead Stirrer Supplied with Cross Blade Impeller (50 X 8X 300 mm ), Boss Head & Plate StandVWRA441-050984798200Enquire
30Overhead Stirrer 20 Ncm, 25 L Capacity, Speed 2,000 RPM, 10,000 MpasVWRA441-050884798200Enquire
31Overhead Stirrer 40 Ncm, 40 L Capacity, Speed 1,000 RPM, 30,000 MpasVWRA441-050784798200Enquire
32Overhead Stirrer Cross-Welded Impeller_50 X 12 X 350 mm , Radial FlowVWRA441-050684799090Enquire
33Overhead Stirrer Straight Blade Impeller_35 X 12 X 550 mm , Radial FlowVWRA441-050584799090Enquire
34Overhead Stirrer Straight Blade Impeller_50 X 12 X 550 mm , Radial FlowVWRA441-050484799090Enquire
35Overhead Stirrer Pivoting Blade Impeller_60 X 15 X 550 mm , Radial FlowVWRA441-050384799090Enquire
36Overhead Stirrer Collapsible Blade Impeller_550 mm , Radial FlowVWRA441-050284799090Enquire
37Overhead Stirrer Square Blade Impeller_38 X 38 X 550 mm , Tangential FlowVWRA441-050184799090Enquire
38Overhead Stirrer Square Blade Impeller_70 X 70 X 800 mm , Tangential FlowVWRA441-049984799090Enquire
39Overhead Stirrer Anchor Blade Impeller_50 X 50 X 550 mm , Tangential FlowVWRA441-049884799090Enquire
40Overhead Stirrer Anchor Blade Impeller_100 X 100 X 800 mm , Tangential FlowVWRA441-049784799090Enquire
41Overhead Stirrer Paddle Blade Impeller_70 X 70 X 550mm ,Tangential FlowVWRA441-049684799090Enquire
42Overhead Stirrer Paddle Blade Impeller_70 X 70 X 800mm ,Tangential FlowVWRA441-049584799090Enquire
43Overhead Stirrer Paddle Blade Impeller_70 X 80 X 550 mm , Tangential FlowVWRA441-049484799090Enquire
44Overhead Stirrer Paddle Blade Impeller_70 X 80 X 800 mm , Tangential FlowVWRA441-049384799090Enquire
45Overhead Stirrer A01 Propeller Impeller_50 X 8 X 350 mm , Axial FlowVWRA441-049284799090Enquire
46Overhead Stirrer A02 Propeller Impeller_100 X 8 X 550 mm , Axial FlowVWRA441-049184799090Enquire
47Overhead Stirrer A03 Propeller Impeller_130 X 8 X 800 mm , Axial FlowVWRA441-049084799090Enquire
48Overhead Stirrer Plate Stand 220 mm X 320 mm with Rod Height Of 575 mm (Max. Load 5 Ls)VWRA441-048984799090Enquire
49Overhead Stirrer Plate Stand 220 mm X 320 mm with Rod Height Of 825 mm (Max. Load 5 Ls)VWRA441-048884799090Enquire
50Overhead Stirrer Plate Stand 220 mm X 320 mm with Rod Height Of 1025 mm (Max. Load 5 Ls)VWRA441-048784799090Enquire
51Overhead Stirrer Boss Head Clamp Plate Stand (Common on All Rod Lengths)VWRA441-048684799090Enquire
52Overhead Stirrer H Stand 500 X 450 X 1020 mm without Boss Head ClampVWRA441-048584799090Enquire
53Overhead Stirrer Boss Head Clamp H-StandVWRA441-048484799090Enquire
54Overhead Stirrer ChuckVWRA441-048384799090Enquire
55Digital Microplate Shaker, Single Position, Speed 1800 RPMVWRA444-122184798200Enquire
56Digital 4 Plate Shaker, Speed 1200 RPMVWRA444-122284798200Enquire
57Incubated Microplate Shaker, Temperature Ambient +3°C To 70°C, Speed 1200 RPMVWRA444-122384798200Enquire
58Digital 3D Shaker (Rocker), 5 Kg Capacity, Speed 120 RPM with Spiked Rubber MatVWRA444-122584798200Enquire
59Sticky MatVWRA444-122784799090Enquire
60Stacking/ Double Decker PlatformVWRA444-122884799090Enquire
61Platform Shaker 10 mm Orbital Die, Orbital Motion 500 RPM, Capacity 7.5 KgVWRA444-122984798200Enquire
62Platform Shaker 10 mm Orbital Die, Linear Motion 500 RPM, Capacity 7.5 KgVWRA444-123084798200Enquire
63Platform Shaker 20 mm Orbital Die, OrbitalVWRA444-123184798200Enquire
64Platform Shaker 20 mm Orbital Die, LinearVWRA444-123284798200Enquire
65Universal platform with adjustable bars (Flask capacity- 13 x 100 mL / 13 x 150 mL / 9 x 250 mL / 6 x 500 mL / 5 x 1000 mL)VWRA444-123384799090Enquire
66Disk attachment Base plate with slip resistance trayVWRA444-123484799090Enquire
67Funnel AttachmentVWRA444-123584799090Enquire
68Base plate for plastic clamps (Capacity- 9 clamps x 250 mL / 9 clamps x 500 mL).VWRA444-123684799090Enquire
69Plastic clamp for 250 mL flaskVWRA444-123784799090Enquire
70Plastic clamp for 500 mL flaskVWRA444-123884799090Enquire
71Base plate for SS clamps (Capacity- 9 clamps x 100 mL / 9 clamps x 150 mL / 9 clamps x 250 mL).VWRA444-123984799090Enquire
72Stainless steel Clamp for 100 mL flask suitable for base plateVWRA444-124084799090Enquire
73Stainless steel Clamp for 150 mL flask suitable for base plateVWRA444-124184799090Enquire
74Stainless steel Clamp for 250 mL flask suitable for base plateVWRA444-124284799090Enquire
75Base plate for SS clamps (Capacity- 9 clamps x 500 mL / 5 clamps x 1000 mL)VWRA444-124384799090Enquire
76Stainless steel Clamp for 500 mL flask suitable for base plateVWRA444-124484799090Enquire
77Stainless steel Clamp for 1000 mL flask suitable for base plateVWRA444-124584799090Enquire
78Platform Shaker, Capacity 15 Kg, Orbital Motion 300 RPM, (30 To 60 mm Orbit)VWRA444-124684798200Enquire
79Platform Shaker, Capacity 15 Kg, Linear Motion 300 RPM, (30 To 60 mm Orbit)VWRA444-124784798200Enquire
80Universal platform with adjustable bars (Flask capacity- 44 x 100 mL / 40 x 150 mL / 36 x 250 mL / 25 x 500 mL / 13 x 1000 mL)VWRA444-124884799090Enquire
81Base plate for plastic clamps (Capacity 24 x 250 mL / 24 x 500 mL)VWRA444-124984799090Enquire
82Plastic clamp 250 mL suitable for base plateVWRA444-125084799090Enquire
83Plastic clamps 500 mL suitable for base plateVWRA444-125184799090Enquire
84Base plate for SS clamps (Capacity 24 x 100 mL / 24 x 150 mL / 24 x 250 mL)VWRA444-125284799090Enquire
85Stainless steel Clamp 100 mL flask suitable for Base PlateVWRA444-125384799090Enquire
86Stainless steel Clamp 150 mL flask suitable for Base PlateVWRA444-125484799090Enquire
87Stainless steel Clamp250 mL flask suitable for Base PlateVWRA444-125584799090Enquire
88Base plate for SS clamps (Capacity 24 x 500 mL / 8 x 1000 mL)VWRA444-125684799090Enquire
89Stainless steel Clamp 500 mL flask suitable for Base PlateVWRA444-125784799090Enquire
90Stainless steel Clamp 1000 mL flask suitable for Base PlateVWRA444-125884799090Enquire
91Cell/ Tissue Homogenizer, Speed 4550 RPM, 24 X 1.5/2.0 mL CapacityVWRA432-043084798200Enquire
92Sample Place Holder & Lid for 24 X 1.5/2 mLVWRA432-043184799090Enquire
93Sample Place Holder & Lid for 12 X 5 mLVWRA432-043284799090Enquire
942 mL Tube (Non Sterile)VWRA432-043384799090Enquire
95Glass Beads 0.4-0.6 mm diameterVWRA432-043484799090Enquire
96Glass Beads 0.8-1.2 mm diameterVWRA432-043584799090Enquire
97Glass Beads 2.5-3.0 mm diameterVWRA432-043684799090Enquire
98Zirconium(94%) Beads 1.0-1.2 mm diameterVWRA432-043784799090Enquire
99Zirconium(94%) Beads 1.4-1.7 mm diameterVWRA432-043884799090Enquire
100Zirconium(94%) Beads 2.6-3.3 mm diameterVWRA432-043984799090Enquire
101Stainless steel Beads 2mm diameterVWRA432-044084799090Enquire
102Stainless Steel Beads 3 mm diameterVWRA432-044184799090Enquire
103Block for Micro Tubes (28 X 1.5/ 2 mL)VWRA460-036184799090Enquire
104Hybrid Block (9 X 1.5/2 mL, 32 X 0.2 mL & 20 X 0.5 mL Tubes)VWRA460-036284799090Enquire
10512 Tubes X 15 mL BlockVWRA460-036384799090Enquire
1065 Tubes X 50 mL BlockVWRA460-036484799090Enquire
107Thermal Dry Bath- 4 BlockVWRA460-036984198990Enquire
biockrodt
Privacy Overview

This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.