So Many UsesAppliances Beams Cabinets Doors Equipment Furniture HVAC Plumbing Joists Countertop Mantels Bathroom Fixtures Curtain Walls Flanges Windows and more!Protetcion MaterialAir Wedge with Double side TPU pouring 420D Nylon Material design rounded corners stiff durable edges smooth exterior for easier insertion to resist greater strain with higher abrasion performanceEasy OperationWring the valve to Right and squeeze pump to inflate Fits into tight 3/32''gaps and opens to 2 1/2'' wide 330lbs load rating for max weight capacityWarningNote Do Not Over Inflate to avoid any damage to the bag or valveWidely application3 sizes inflatable air shim bags ideal for leveling furniture window/door alignment great kit for contractor tool