Pump Rod Cup Seal for Crosman 100, 101, 102, 104, 120, 140, 1400, 760, 130, 130, etc. Crosman guns made before 1975 use CRS101-036 seals, after that date all Crosman pneumatic guns use the CRS760-140 pump seal. The old style seals are almost impossible to get and even harder to install without out specially made tooling.
