Description_x000D_ General description_x000D_ Corning® disposable 50 mL centrifuge tubes are available as either clear polyethylene terephthalate (PET) tubes with a traditional plug seal cap or polypropylene tubes with either plug seal caps or the new CentriStar™ caps._x000D_ The CentriStar™ cap has a easy-on/easy-off top and offers advanced ergonomics with its wider knurls and roll-over edge design. All tubes come in a variety of packaging options._x000D_ • Sterile, certified nonpyrogenic and DNase-/RNase-free_x000D_ • Black printed graduations and a large white marking spot_x000D_ • Maximum RCF for PET tubes is 3,600xg_x000D_ Universal rack indicates that the rack fits both 15 mL and 50 mL tubes._x000D_ Legal Information_x000D_ CentriStar is a trademark of Corning, Inc._x000D_ Corning is a registered trademark of Corning, Inc.