Industrial grade Fabricated Piston Seal is used to provide enough resistance in order to maintain the hydraulic pressure necessary to make the piston move. The Piston Seal is fitted internally to the cylinder head and seals against the cylinder bore, preventing fluid from flowing across the piston. The Piston Seal is made of polyurethane, nitrile, fluorocarbon, Silicone, EPDM, fabric reinforced Elastomers which ensures optimum durability along with long lasting trouble free service. Industrial grade Fabricated Piston Seal is strong and rigid in construction and requires minimal maintenance.