Corning 500mL PP Centrifuge Tubes with Plug Seal Cap, Sterile, 6/Pack, 36/Case Corning 500mL polypropylene (PP) centrifuge tubes are ideal for applications requiring large volume centrifugation. Please check our Technical Information Listing for information on the physical and chemical properties of Corning plastic centrifuge tubes as well as important suggestions for safe use. Support cushions (Catalog No. 431124 for 500) must be used with this product unless the centrifuge rotor has appropriate V-bottom cushions High Density Polyethylene plug seal caps Maximum RCF of 6,000xg. Tubes are sterile and certified nonpyrogenic Product Description Qty./Pk.: 6 Qty./CS.: 36 Capacity: 500 mL Tube Style: Centrifuge Bottom Style: Conical Neck Style: Short Top Style: Threaded Max RCF: 6000 xg Graduations: Yes Color: Natural Cap Style: Plug Seal Cap Material: High Density Polyethylene Cap Color: Orange Sterile: Yes