PerformR® Conical centrifuge tube. 15 mL. Sterile. With attached plug style screw caps. Black printed graduations and white writing spot. ATP, RNase/DNase and Endotoxin Free (non-pyrogenic). Validated Sterilization (ISO 11137) for use in Research and Medical labs. Polypropylene USP Class VI resin. Centrifuging to 12,500 x G. Freezable to -80C. Autoclavable. Capacity: 15 mL. Teal color caps. 25 tubes per reusable polypropylene rack/2 racks per pack/6 packs per case. 17 mm W. 118 mm H. Made in USA. Compare to VWR# 76176-954.