PerformR® Conical centrifuge tube. 50 mL. With flat screw caps, black graduations and white writing surface. ATP, RNase/DNase and Endotoxin Free (non-pyrogenic). Polypropylene USP Class VI resin. Centrifuging to 12,500 x G. Freezable to -80C. Autoclavable. Capacity: 50 mL. Teal color caps. 500 tubes per bag/500 caps in separate bag/500 tubes and caps per case. 29 mm W. 115 mm H. Made in USA.