This MaxyClear™ boil-proof microtube will not open during boiling. Closes with a "snap" and stays closed during centrifugation. Features a frosted cap surface for labeling and a frosted panel on the side for writing. Has a 0.28mm piercing port in the center of the cap to allow easy access to sample by syringe needle. Certified boil proof. Autoclavable. Certified RNase, DNase, and pyrogen free. Non-sterile. Volume: 1.5mL. Color: Clear. Max. RCF: 20000g. Corning Axygen® #: MCT-150-C.