SuperClear® Conical Centrifuge Tubes. 15mL. With attached flat screw caps. Caps include integral molded elastomeric seal. Patented anti-smear writing surface. 3 color printed graduations and reverse reading scale. 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 17,000 x G. Freezable -80C. Autoclavable. Teal color caps. 25 tubes per low waste fiber rack/2 racks per pack/10 packs per case. 17mm W. 118mm H. Made in USA. Compare to VWR# 21008-103.