Meet bioanalytical-grade requirements and provide unsurpassed performance in critical research applications E x ceptionally strong—Industry leading centrifugation rating of 16, 000 RCF (50 mL polypropylene) Unique double threaded cap design reducing cross threading and leakage Easy-to-read graduations Consistent biological and physical propertiesIdeal for long-term cryogenic storage of specimens at -80°C (15 to 225 mL polypropylene tubes) The most dependable tube in the lab, Falcon conical tubes are easy-to-use, high quality tools to protect your precious samples. State-of-the-art design and manufacturing create tubes engineered to provide high strength, wide temperature stability, and to perform in your critical applications. They will protect your valuable samples during centrifugation, vorte x ing, and long term storage in the freezer. To meet this intense challenge, Falcon tubes are designed for: High strength: State-of-the-art mold design, coupled with advanced resin selection, create tube walls that are engineered to perform under high-stress situations. Nonpyrogenicity: Tested to less than 0.1 EU/mL. Nonto x icity: Resins are selected via an intense array of U.S. Pharmacopoeia (USP) to x icity tests. Low protein binding: Corning engineers and scientists are continually searching for materials and processes that minimize labware-induced interference, such as protein binding. Quality packaging: Falcon tubes, in addition to offering bioanalytical-grade performance, use medical-style packaging to better assure sterile presentation. The conical tubes are packaged in convenient reusable racks or compact environmentally-friendly bulk packs. Support cushions (Catalog No. 352090 for both 175mL and 225mL) must be used with this product unless the centrifuge rotor already has appropriate V-bottom cushions. Falcon 225 mL PP Centrifuge Tube, Conical Bottom, with Plug Seal Screw Cap, Sterile, 8/Bag, 48/Case This listing is for Case of 48