1.7mL Capless SuperClear® Polypropylene Microcentrifuge Tubes without caps. Resealable bags. Not for vortexing. Without caps Includes side graduations, and frosted writing surface ATP, RNase/DNase and Endotoxin Free (non-pyrogenic) Polypropylene USP Class VI resin High centrifuging to 20,000 x G...