Oee offers a full line of pistons for duplex and triplex mud pumps. All api types are available. Among these are: bonded urethane pistons and pistons with replacement rubbers. This is a piston with replacement rubbers .It includes plate, snap ring , piston hub and rubber. The hub is formed from high grade steel. (40cr) .The piston rubber is made from specially formulated compounds which are resistant to the effects of heat, oil and water. The multi-ply fabric reinforced backings used in the production of the piston rubbers provide positive, wear resistant seals.