Heavy Duty Piston U-Cup

2-1/4" X 2-3/4" X 5/16" - Heavy Duty Piston Seal 2-1/4'' Inside Diameter 2-3/4'' Outside Diameter 5/16'' Height 1/4" Cross Section Pressure Range: 0...

3-1/2" X 4" X 3/8" - Heavy Duty Piston Seal 3-1/2'' Inside Diameter 4'' Outside Diameter 3/8'' Height 1/4" Cross Section Pressure Range: 0 - 6,000...