1. Car air pump wedge inflatable shim. 2. Powerful hand pump lifts up to 220 lbs, span gaps 3/32 to 2 inches. 3. Can be used for window, door and cabinet installations; replaces damaging pry bars and wooden shims. 4. Very easy to inflate and deflate the shim. When you inflate the air shim, it stays pressurized. When you press the button near the air pump, it can release the air quickly. 5. Convenient to use. Durable and practical. 6. Material: Polyurethane rubber 7. Size: approx. 170 x 150mm
