Pistons with replacement rubbers:
This piston includs:piston hub.snap ring, piston rubber and plate. The rubber can be changed when it's broken.The piston hub is made of 40Cr.The plate is made of 45# steel. And the snap ring is made of 65Mn.
HNA can offer bonded urethane piston and pistons with replacement rubbers, and the latter ones include single action and double action.