Centrifuge Tubes 50 ml PP Conical Bottom with CentriStar | Corning Cat. 430828 1 pack isi 25 tube Descriptions : Corning 50 mL PP, Centrifuge Tubes, Conical Bottomwith CentriStar Cap,Rack Packed, Sterile, 25/pack, 500/Case Corning 50mL clear polypropylene (PP) centrifuge tubes come with the advanced polyethylene CentriStar caps and are packed 25 per rack. The CentriStar Cap has a easy-on/easy-off flat top and offers advanced ergonomics with its wider knurls and roll-over edge design for easier gripping. This leak-proof design comes with a revolutionary plug feature that virtually eliminates all seepage when used under recommended conditions. Superior Performance - Maximum RCF is 12,500 xg - Temperature range from -80C to 120C - 5 year shelf life Ease of Use - Leak proof design - Easy-on/easy-off cap - Clear accurate graduations - Large white marking spots Reliable Quality - Certified RNase-/DNase-free - Heavy-metal-free color concentrate - Medical grade polypropylene - Nonpyrogenic - Sterile