Thermo Scientific™ Nalgene™ Graduated Economy Cylinder Easily dispense liquids with generous pour spouts and molded-in graduations on these clear cylinders. Polymethylpentene No meniscus to confuse readings Non-wetting; calibrated TC/TD at 20°C Large rounded base is ribbed for reinforcement & stability Very good chemical, heat & impact resistance Window-clear Generous pour spout Maximum temperature: 135°C