SCR50 50ml centrifuge tube rack (25 holes) 100 pcs/box entrifuge Tube and Rack sets are a convenient solution for organizing and storing Conical Bottom tubes. Racks are made of expanded polystyrene (EPS) and include holes arranged in a zigzag format for easy dispensing. Racks contain 50 of the 15ml tubes or 25 of the 50ml tubes. Sterile tubes are avilable in Clear or Amber styles. Autoclavable at 121C and 15 psi for 30 miniutes. Radiation sterilized. DNase, RNase, Pyrogen and latex-free. Maximum RCF 14000.