2", Finger, Piston, Cup Expander
- Brand: AlbionDesignated Size: 2 InchItem: Cup ExpanderType: Finger-TypeUsed On Power Tool: #21-1 TPI Leather Piston
- Piston Cup Expander; Item Cup Expander; Type Finger-Type; Designated Size 2 Inch; Used On Power Tool #21-1 TPI Leather Piston
- The most economical way to reduce leakage or blow-by in a bulk gun. When placed inside the face of a piston cup, below the small steel washer, it creates a tighter seal against the inside of the gun barrel.