Winbag --Pump it up! The WINBAG's inflatable air cushion replaces the need for wooden shims and plastic wedges in window, door and cabinet installations; uses of fiber reinforced material that is durable enough to be used time and time again. It's very powerful; hand operated pump gives the WINBAG a maximum load of 220 pounds per bag. Unlike wooden shims and plastic wedges that can mar surfaces, the WINBAG air wedge doesn't leave marks and is gentle on its surroundings. Accomplish larger jobs by adding another WINBAG to increase capacity. The WINBAG can even be used to level furniture around the house or as a door stopper. With the WINBAG, a single professional installer can position, adjust, align, level, and hold work materials in place, saving time and reducing costs.