Unique structure design of the cap provides double security, further improve the seal ability. Increased the thickness of conical bottom in order to improve the maximum centrifugal limit. Polypropylene tube and high density polyethylene cap Max. centrifugal limit 7000xg. Temperature range: -80oC~120 oC Clear scale DNase, RNase and pyrogen free Electron beam sterilization, SAL=10-6 Separation of sediments after chemical reactions for harvest and application. Harvest of biomacromolecules, inorganics and organics. In biochemistry and other biological fields, usually used to centrifuge and collect a large volume of cells, biomacromolecules and supernatants. (50 per CS )