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