VWR Screw-Cap Microcentrifuge Tubes Screw Cap Tubes With Clear Loop Caps Pack of 500. Combining top-notch and uncompromising quality with an affordable price the VWR Screw-Cap Microcentrifuge Tubes Screw Cap Tubes With Clear Loop Caps 3646-870-300/ 89004-316 can fulfill your laboratory needs while still offering a great value for the money. Product Category Description: Made of high-quality polypropylene plastic these clear microcentrifuge tubes are designed to be filled with a standard microcentrifuge tube needle a toothpick or other implement. The long easy-to-screw tube ends with a cap feature molded airtight sealing rings and no leakage. Tubes are color-coded with an increasing number of tubes containing graduation marks every two tubes. Vacuum-formed polypropylene tubes without a cap feature a small butt-top opening and without a secondary sealing ring inside the tube neck. Caps have an increased diameter compared to traditional microcentrifuge tubes eliminating any possibility of contamination from powder in the cap. Large tubes feature a wider range of cc per tube allowing many samples to be taken at once. With this expanded choice of cap colors tubes with clear caps are easier to identify in storage. The tops of all tubes are color-coded for sample identification. Tubes with a loop cap offer an added measure of safety. All caps are hermetically sealed with O-rings and provide a liquid tight seal. For filling with gas or liquid nitrogen tubes with large O-rings are color-coded for easy opening in the laboratory. Specifications for VWR Screw-Cap Microcentrifuge Tubes 3646-870-300 Screw Cap Tubes With Clear Loop Caps : Volume mL: 0.5 Style: Freestanding Sterility: Nonsterile Maximum RCF: 20000 g (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine Labcon products authorized for sale in the U.S. and other markets so you can be sure that you are buying authentic Centrifuges with a full manufacturer's warranty in addition to our own 100percent Satisfaction Guarantee. We are your premier online distributor for VWR Centrifuges. We are an authorized supplier to all federal and state government agencies as well as to research and educational institutions and can facilitate volume orders on many types of laboratory equipment lab consumables and other products to help fulfill your specific needs. We offer Free Shipping and FREE USPS shipping to APO and FPO addresses on all orders in our store over 49. Please refer to our APO/FPO Shipping and Export Restrictions for more information on export to APO/FPO addresses. In addition to the VWR Screw-Cap Microcentrifuge Tubes Screw Cap Tubes With Clear Loop Caps 3646-870-300/ 89004-316 we carry a full complement of Centrifuges as well as other product offerings from Labcon. We also carry a full line of VWR accessories to help meet your laboratory and scientific needs. For a complete selection of VWR Centrifuges please visit our Labcon page. For more brand name Centrifuges please visit our Centrifuges store section. To see our complete line of lab medical industrial and scientific products please see our science and lab equipment online catalog. VWR Screw-Cap Microcentrifuge Tubes 3646-870-300 Screw Cap Tubes With Clear Loop Caps Pack of 500