PYREX 10mL Heavy Duty Conical Centrifuge Tubes with White Graduations and Screw Cap. Increased wall thickness for greater mechanical strength. Conform to outside diameter and overall length limitations imposed by centrifuge rotors and supports. Threaded rubber-lined screw cap is fabricated of specially formulated Phenolic resin to resist effects of temperature and steam. Material: Borosilicate Glass Code 7740. Capacity: 10mL. Tube Style: Centrifuge. Tube Shape: Cylindrical. Top Style: Threaded. Thread Finish: 15-415 GPI. Bottom Style: Conical. Length: 118mm (approx). Outer Diameter: 17mm (approx). Corning #: 8142-10.