FisherBrand Microcentrifuge Tubes 2.0mL Graduated Free Standing Screw Cap Tube with Cap & O-Ring Description Reduce sample contamination by keeping cap with tube Natural-colored polypropylene tubes include leash-and-loop tether. Ultragrade polypropylene caps are fitted with ethylene/propylene O-rings. Available sterile or nonsterile with round or skirted bottoms. Removable tether rotates freely for easy opening and closing O-ring forms positive seal with tube to reduce leakage Withstand 20,000xG Suitable for vapor-phase liquid nitrogen storage, boiling and autoclaving RNase and DNase free Order Info Nonsterile tubes come separate from tether caps; sterile tubes come attached; 500 per pack Max. RCF 20000xG Closure Material - Polypropylene Autoclavable - Yes Color - Natural Max. Force - 20000xG Packaging - Bag Sterility - Sterile Closure Type - Tether Cap Capacity (Metric) - 2mL Material - Polypropylene For Use With (Application) Suitable for vapor-phase liquid nitrogen storage, boiling and autoclaving Shape - Skirted