Impact resistant, self-standing 2.0 ml screw cap microcentrifuge tubes are designed to withstand the rigors of bead beating extractions or homogenization. Made from a specially formulated blend of polypropylene that increases elasticity for increased durability. Also suitable for use in vapor-phase liquid nitrogen storage, -80°C freezers, boiling, and autoclaving. Deep external threads protect against sample loss and seal failure. RNase, DNase, and DNA and free. Autoclavable.