1、Multi Function: Air shim pump uses as a pry bar or lever for door, window and cabinet installation. It can also be used as a car unlock tool or car repair. 2、Composite Fiber Material: Air shim bag doesn't leave any traces in the surroundings. The cushion is also reinforced with fibers, making it durable enough to be used again and again. 3、Strong Bearing Capacity: Each air shim bag is powerful enough to lift 200kg. This set has 4 air shim. 4 used together can lift up to 800kg, more stable and safer. 4、Fully Deflated: When fully deflated, air shim bag is only 1.5mm thick, which makes it easier to wedge door clearances and installers' kits. 5、Being Full of Air: After being full of air, the object can be lifted up to 9CM. Inflatable shim bag can be used repeatedly. Item Type: Door and Window Installation Air Cushion Material: Composite Fiber Material Color: Black Weight: Approx. 315g / 11.1oz Air Cushion Size: Approx. 16x16cm / 6.3x6.3in Product Features: strong compressive and load bearing capacity, and a single product can withstand a weight pressure of more than 200 kg. After being full of air, the object can be lifted up to 9CM. It can be used repeatedly. (At least 2 pieces of glass should be used at a time for installation. If it is installed in other households, the number used each time will be more) 4 x Air Shim Bag