Nalgene* Sterile Cryogenic Vials with Screw Cap

Self standing, polypropylene vials with HDPE closures. Externally-threaded for aseptic technique. Features a sealing ring in conjunction with specially-designed threads. White marking area, graduations and fill line printed on vials. Vials with silicone gasket can be centrifuged up to 8000 x g. Sterile tubes with closures attached are radiation sterilized, non-cytotoxic and non-pyrogenic. Non-sterile vials are packaged separately from closures. Do not autoclave.