The original winbag-pump it up. The WINBAG Inflatable air cushion is an innovative alignment tool that can replace shims and wedges when leveling and installing Windows, doors, kitchen cabinets, and household appliances. Unlike wooden shims and plastic wedges that can Mar surfaces, the WINBAG air wedge doesn't leave marks and is gentle on its surroundings. The WINBAG's Inflatable air cushion is made 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 300 lbs. Per bag. Accomplish larger jobs by adding another WINBAG to increase capacity. The WINBAG spans gaps from 3/32 in. To 2 in. With infinite adjusting possibilities and deflates at the touch of a button. The WINBAG can even be used to level furniture around the house or as an effective 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.