★ Since the gas struts need to be installed by themselves, you should consider whether you can install them independently. It is recommended: one for cabinet door width <600mm/23.6in, and two for cabinet door width >600mm/23.6in to achieve parallel opening and closing synchronization. , Choose the model and quantity according to the weight of the actual cabinet door panel. The choice is not soft and hard, and the small one cannot hold the cabinet door, 10N=2.2ib=1KG. | ★Stable & No Rusty: gas struts is made of copper core with zinc plating, which prevents from rusting even aftering using for a few years.If there is a problem with the product or installation difficulties, please contact customer service as soon as possible to send installation pictures or videos, thank you. | ★ Install the nail plate and insert the ball into the plastic hole. You can remove the metal clip with a screwdriver or a screw when you need not to use.*It is suit for heavier kitchen cabinet, bedroom trunks, toy box or storage box under window bench seat as well as folding table for RV. | ★ Pressure:120N/26lb/12KG (Per Strut);Length ( hole center to hole center) :9-11/16'';Travel:3-14/25'' ,Distance between ball mounts compressed: 6-1/8". 120N Gas Shocks suit best for the door weight 100N-120N，The door panel weighs more than 26lb, 12KG, it is not suitable for use. It will not be able to be supported, so use two or higher pressure models. | ★ 1.The gas spring piston rod must be installed in the downward position, not upside-down, which can reduce friction and ensure the best damping quality and cushioning performance. 2.The gas spring piston rod is strictly prohibited from rotating to the left. If you need to adjust the direction of the joint, you can only turn it to the right. (Avoid the loss of gas in the cavity) 3.The connection point should be installed flexibly without jamming.