Caulk Master PG151 Professional Air Powered Dispensing Gun The PG151 dispensing gun has a 2 in 1 handle that will dispense material from both 10.3 and 30-Ounce cartridges. Tool comes with a 3 foot air hose and standard fitting to easily connect to a high-pressure regulator and air tank or compressor (purchase separately). Unique twist lock bayonet barrel mount makes the insertion and removal of cartridges easy and convenient. Common grip will handle all sealant, caulk and adhesives. Weight 2 1/2lbs