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. 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, if unfortunately our SOFT OPEN LID GAS STRUT did not work well, please kindly contact us for exchange, refund or return. Suitable for Gas Strut, Gas Spring, Lid Support, Gas Shocks, Lift Support, Lid Stay, Heavy Duty Kitchen Cabinet Doors, RV Overhead Cabinet Doors, Display Table, Cabinets, Toy Box or Storage Box etc. 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". Please select the correct model strictly according to the data sheet of the detailed picture. The installation must be installed in strict accordance with the size of the installation picture, and the wrong installation size will bend the mountain-shaped hinge fittings on the cabinet door. 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., Manufacturer: WANLIAN