Goes by many part numbers and fits 100's of different 25mm dovetailed pistons from Crosman, BSA, Gamo, Cometa, RWS, Diana, Air Arms TX200, BAM etc.
[NEW ProSEAL25 Piston Seal with Moly Color 'Black]
Precision CNC machined from no burn Urethane, molybdenum disulfide impregnated material that will provide long-life permanently lubricated.
Our precision machined PS25-M seal will conform excellent compression sealing during dynamic sealing in non honed/honed tubes.
Further, it performs excellent power sealing in over and under size compression tubes.
Shown assembled onto Diana piston.