Features: 1[THICK RUBBER] Made of thick rubber, high strength and wear resistance, with special soft plate and leaking gas, can withstand a pressure of 200kg. 2[MAIN PURPOSE] The inflatable shim bag can fully solve the problem of poor positioning and fixing during the installation of doors and windows. 3[MULTIPLE FUNCTION] The installation height and horizontal displacement of doors and window can be adjusted arbitrarily to assist in positioning and alignment operations. 4[EASY OPERATION] The air bag pump is easy to operate, replace cork to quickly fix and position, which has high efficiency and labor saving. 5[WIDE APPLICATION] Can solve the installation and adjustment problems of swing doors, wooden doors, metal doors and windows. Item Type: Air Bag Pump Size: Approx. 165 x 150mm / 6.5 x 5.9in Material: Thick Rubber Package Included: 1 x Window Installation&nbspAir&nbspBag