This 25mL polymethylpentene (PMP) graduated cylinder with blue polypropylene (PP) base has no meniscus to confuse readings. Large blue PP base prevents tipping; has a generous pour spout. Can be chemically sterilized without affecting accuracy. Can be autoclaved but accuracy will be affected. These cylinders are suitable for food and beverage use. PMP resin meets requirements of CFR 21 Part 177.1520. Guaranteed to meet accuracy requirements of ASTM Class B E1272 and all requirements of ISO Standard 6706. Material: polymethylpentene with blue polypropylene base. Capacity: 25mL. Subdiv: 0.5mL. Limit of Error: ?0.34mL. Nalgene #: 3663-0025.