Welcome to the store! The air cushions are made of thick TPU material, very durable and difficult to wear out. The valve is completely sealed, does not leak, and can be used repeatedly. The air cushion is very flat, with a thickness of only 1.5 mm, and can be easily pushed into a small space. Without a load, the cushion can be inflated to a maximum thickness of about 7 cm. Air pump with a hand pump and a check valve, pumping and deflation are easy, and you can deflate the air again to adjust the appropriate height by pressing the button. The mounting plate size is 15*16 cm, the rubber hose is 25 cm long, and the load is 200 kg. One person can easily lift heavy objects, providing great convenience for installation work. For lifting, adjusting, moving, fixing, etc. Perfect for DIYers, also very suitable for door and window installers, indispensable for installing windows, hatches, even heavy doors. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!