Conical screw cap centrifuge tubes have a large white labeling area and easy-to-read graduations. High density polyethylene cap has a sealing ring for a leak-proof seal and is flat for easy labeling. Copolymer polypropylene offers excellent clarity and strength and has the same chemical resistance as polypropylene. Withstands 10,000 x g and has a temperature range of -40°C to +120°C. 34x117 mm. 500 tubes per case.