This 250mL centrifuge bottle is made of polypropylene copolymer and has a polypropylene screw closure. Translucent bottle has excellent chemical resistance and is strong and rigid. When using this 250mL-size centrifuge bottle in the Sorvall GSA rotor use the Nalgene® centrifuge bottle adapter (see item#: NAL-DS3125-0250). Before autoclaving set closure on top of the bottle without engaging the threads. For proper performance this bottle must be filled to at least 80% of the total capacity. This 250mL bottle has a maximum rating of 13,200 x g. Autoclavable. Capacity: 250mL. Material: polypropylene copolymer with polypropylene screw closure. 4/Pack; 36/Case. Nalgene® #: 3120-0250.