RPI Tamper Evident Micro-Tubes, Non-Sterile, Free Standing, 0.5 mL, 1000 Per Case

Unique micro-centrifuge tube features a tamper evident closure system. Simply attach cap to tube and the sealing ring is automatically in place. When the cap is loosened, the ring detaches to clearly indicate the tube was opened. Ideal for use in boiling, centrifuging and freezer storage applications. Cap has an O-ring seal that provides a leak proof fit. Tubes withstand centrifugation to 17,000g and can be autoclaved.