This set of 2 aftermarket wheel cylinders is designed for Clark Model C20B forklifts. They have 2 mounting holes and are a direct replacement for the left and right side of the forklift. The braking system part type ensures safe and reliable operation of the forklift. The inner piston diameter is 7/8" and comes with a 1-year warranty. It is recommended to buy 2 for optimal fitment. These wheel cylinders are compatible with other Clark forklift models and make a great addition to any warehouse's forklift parts and accessories inventory.