Our PTFE Washer Seals fit our RE Series Rotary Evaporators. These seals are made of PTFE to provide excellent resistance to solvents. These PTFE washers fit our RE-1005, RE-1010, Re-1020, RE-1050 Rotary Evaporators. Look at the guides below to determine which washers you will need. If you have any questions, please email or give us a call!  PTFE SEAL WASHER SpecificationsSize#35#50#60#70#80Outer Diameter35mm50mm60mm70mm80mmInner Diameter25mm40mm50mm60mm70mmRoto Clamp Size#35#50#60n/a#80Height4mm For Technical Support, Questions, or Other Issues Please Email or Call Us!