Centrifuge bottles allow you to easily centrifuge a larger volume of samples. Each centrifuge bottle is overwind-protected and gas tight, allow maximum filling volume and maximum speed, and have a one piece sealing cap with an O-ring that guarantees a leak-proof seal. The special black polypropylene bottle reduces UV light transmission; perfect for light sensitive samples. Polypropylene pads are available for centrifuge bottles with round bottoms to prevent unnecessary stress and cold flow of the plastics within the rotor cavity. For more information about the centrifuge bottles, see the HeroLab Centrifuge Labware Manual.