Feature: 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. Specification: Item Type: Air Bag Pump Size: Approx. 165 x 150mm / 6.5 x 5.9in Material: Thick Rubber. Package List: 1 x Window Installation Air Bag Note: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item.2. Compare the detail size with yours. Due to manual measurement, please allow an error of 1‑2cm.3. If there is a problem with the product, please leave a message before giving bad feedback, thank you for your understanding.