Lock-Top? microcentrifuge tubes have a security tab that extends from the front of the cap over the tube. The tab helps the tube stay closed and also helps prevent cross-contamination of either the cap plug or your gloves. The tube is designed to withstand centrifugation up to 17,000 x g and temperatures up to 85°C (not intended for boiling). Polypropylene.

Color Lock-Top? tubes offer a unique option - the color is only added to the center of the tube cap, keeping the rest of the tube clear.

• Frosted side writing area
• Graduations at 0.1, 0.5 and 1.0 ml
• Color caps allow both color coding and maximum sample visibility