Corning

" These conical-bottom screw cap microcentrifuge tubes serve a broad range of laboratory needs including collection, pressing, centrifugation, long-term storage, and OEM packaging and shipping of restriction enzymes or other DNA/RNA modifying reagents. Color-coded caps provide a syringe port that is easily pierceable for radioisotope labeling and fraction collecting. The threaded O-ring design ensures a uniform closure allowing centrifugation up to 20,000g. Microcentrifuge tubes have ribs on the cap and tube to fit the AxyRackâ„ microtube racks (see 10011-272 series) to allow single-handed opening and closing. Polypropylene tubes are certified RNase-, DNase-, and pyrogen-free. Tubes without ribs are also available -contact your sales representative for information. Microcentrifuge tubes serve a broad range of laboratory needs including collection, centrifugation, long-term storage, and OEM packaging and shipping of restriction enzymes or other DNA/RNA modifying reagents. Threaded O-ring design ensures a uniform closure. Ribs on cap and tube are designed to fit the AxyRackâ„ microtube racks (see 10011-272 series) to allow single-handed opening and closing. MAXYMum Recoveryâ„ tubes feature an ultra-smooth surface completely free of occlusions and cavities, virtually eliminating sample retention while improving accuracy. Certified RNase-, DNase-, and pyrogen-free."