Package contains: 4 pieces gas springs have strong load capacity and uniform force. The height is 270mm and the pressure is 120N / 12kg. High quality gas cylinder: The cylinder is made of high quality zinc alloy and ABS, which is both healthy and environmentally friendly. #39;environment. It is abrasion resistant, strong and durable, thickened, oxidation resistant, and does not fade. Good damping effect: The piston cylinder is filled with gas inert-nitrogen, with high compression ability, and the installation process is more stable and safe. Excellent cushioning and sealing. Easy to install: The contact area of the metal plate of the gas spring and the cabinet is large, and the three-point positioning makes it more durable. Applications : These gas lifts are suitable for all kinds of wooden doors, aluminum doors, cabinets, tatami mats, TV cabinets and bookcases.