Calculated Industries #1190 Air Shim Inflatable Pry Bar and Leveling Tool; 300 LB Rating; Contractor-Grade Alignment Pump Wedge CONTRACTOR-GRADE inflatable air wedge for window, door and cabinet installations; replaces damaging pry bars and wooden shims 300 LB LOAD RATING safely handles full size installations with just a single installer; saving time and labor costs ROUNDED CORNER AND INTERNAL STIFFENER gets into tight 3/32 gaps and wont fold under pressure; durable, no-scuff cover leaves no marks WIDE 2-1/2 GAP SPANNING CAPACITY means greater lifting or pushing range and more versatility on the job or around the house EASY ONE-HANDED OPERATION using simple squeeze pump and precise bleeder valve lets you raise and lower to perfect alignments