Description General description Non-wetting, they deliver all they contain (calibrated TC/TD at 20°C). Meet Class B accuracy requirements of ASTM E1272 "Cylinder, Graduated, Laboratory, Glass" and all requirements of ISO Standard 6706 "Plastic Laboratory Ware-Graduated Measuring Cylinders". No meniscus to confuse readings. Blue, molded, PP base resists tipping. Molded-in graduations with additional major graduation lines on the back of cylinder for easier, more accurate fluid level readings. Generous pour spout. Can be autoclaved, but accuracy will be affected. Legal Information Nalgene is a registered trademark of Thermo Fisher Scientific or its subsidiaries