These micro sample tubes have a captive plug and will withstand the forces of a microcentrifuge. Polypropylene Steam autoclavable at 121°C (250°F)

Dimensions: 79mm (3-1/8") long Easily open all sizes of microcentrifuge tubes with just one hand One end opens 1.5 to 2.2ml tubes, forked blade on opposite end opens smaller sizes: 250m, 400m, and 550m tubes