"An extra heavy "O" ring to assure watertight fit. To be installed in areas where internal pressure (oil-canning) is NOT present. Ideal for inspection compartments, for clean out or access to shut off valves, back-up fasteners."
ID: 6-3/16", OD: 8-1/8", Hole: 6-1/2", Color: White, Center: Non-Skid
Sold: Each