This 250mL Teflon FEP centrifuge bottle with Tefzel ETFE screw closure is ideal for low-speed centrifugation of aggressive chemicals. Excellent for large-volume lipid and phenol extractions digestions and precipitations. Resists most acids bases ,and organic solvents. Autoclavable bottle rated for temperatures from -100? to +150?C. Use Nalgene sealing cap assembly (see item#: NAL-DS3131-0038) to run this bottle at maximum recommended speed (4,000 x g). When using this bottle in the Sorvall GSA rotor use the NALGENE centrifuge bottle adapter (see item#: DS3125-0250). Before autoclaving just set closure on top of the bottle without engaging the threads. NOTE: FEP centrifuge bottle must be filled to 100% of the total capacity for proper performance. Autoclavable. Capacity: 250mL. Material: Teflon FEP centrifuge bottle with Tefzel ETFE screw closure. Nalgene #: 3127-0250.