Polymethylpentene volumetric flasks provide the accuracy of standard glass flasks combined with the break resistance of plastic. Polypropylene Screw Closure. Individually calibrated gravimetrically 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. Translucent. Before autoclaving, set closure on top of the container without engaging the threads.
