NALGENE® 4001 Volumetric Flasks, polymethylpentene; polypropylene screw closure

The accuracy of standard glass flasks combined with the break resistance of plastic. Gravimetrically calibrated individually at TC/TD at 20°C. Printing is durable; won’t wear off. Guaranteed to meet the Class B accuracy requirements of ASTM E288 and ISO Standard 384. No meniscus to confuse readings. Window-clear. Before autoclaving, set closure on top of the container without engaging the threads. Autoclavable/Transparetn/Graduated/Leakproof.