TUBE, TEST POLYPROPYLENE 12X75MM 5ML (1000/BG) McKesson Plastic Test Tubes Molded from premium-grade polypropylene (PP) for impact strength and stability to common acids, alkalies, and solvents Autoclavable, freezable and can withstand 3000 RPM during centrifugation Non-graduated, translucent tubes with round bottoms Brittleness temperature: 20ºC Maximum temperature: 90ºC Not Made with Natural Rubber Latex Packaged: 1000 Per Bag