Axygen® 1.5mL Self Standing, Screw Cap Tubes feature screw caps that provide a tight secure seal. Will withstand up to 20,000 RCF Screw cap contains O-rings to assure efficient sealing and avoid evaporation Certified RNase-/DNase-free Nonpyrogenic

Posi-Lock™ Graduated Microcentrifuge tubes feature a small, easy-to-open/close cap with the assurance of an audible "click" to know that your sample is secure. Boilproof Fits standard centrifuge rotors, racks, and storage boxes Graduated every 100µL for easy volume…