100 Hydraulic Gas Spring For Cabinet Door, Soft Opening Hinge, Cabinet Lifting S DURABLE MATERIAL: The gas piston arms are made of steel and are very stable to use, ideal for slow opening and closing of doors. Air pressure: each pressure support can reach 20N - 100N, you can apply it to all the supports in your house. Application: Ideal for kitchen and office cabinets etc. With support rod Easy to install: Install the pegboard and insert the ball into the plastic hole. The metal clips can be removed with a screwdriver or screws when not in use.