Centrifuge 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 121°C and 15 psi for 30 miniutes. Radiation sterilized. DNase, RNase, Pyrogen and latex-free. Maximum RCF 14000.