Feature●?? TUBE MATERIAL: These 15mL centrifuge tubes are made in high purity PP Material. They are designed to have longer length screw caps with sealing rings to prevent leakage. Pack of 50.●?? EASY TO DISTINGUISH: Plastic centrifuge tubes also include a convenient white writing patch for easy marking and identification. The patches are nice for labeling. And the test clear conical tubes with screw caps.●?? AUTOCLAVABLE AND FREEZABLE: Max. RCF: 9,400 for conical bottom tubes; it is autoclavable at 121℃/249.8℉ and freezable to -80℃/-176℉.●?? STERILE SYRINGE FILTERS: Our syringe filter is manufactured for reliable performance, which is sterile Polyethersulfone (PES) needle filters. Each lot of syringe filter membrane is certified by HPLC Extractable Test.●?? HIGH THROUGHPUT: The larger filter surface area increases flow rate and throughput. It also makes it easier to filter solutions because it reduces the pressure required to empty the syringe.Description The bundle provides a 10% promotion on 15mL conical centrifuge tubes and sterile syringe filters.