Duo-Fast SM-7664 SM-7648 Parts
Duo-Fast SM7664 + SM7548 Rebuild Seal, part #17, 1015035, SM-111-2 (Cylinder Seal) Complete O-ring kit Also have bumper available below #22, 1015038, SM-110-5 Pictures and rebuilding video below, Download Schematic sm-7648_sm-7664