The CRL Quart Size Air Caulking Gun is made for those caulking materials in "Jumbo" quart (30 fluid ounce 887 milliliter) size cartridges. It's fast loading with a twist lock barrel. The precision air control valve makes applications smooth. Comes with three foot of standard 1/4 inch (6 millimeters) NPT hose fittings and requires 5-65 psi. The barrel accepts all standard quart cartridges and comes with a barrel for standard size caulking cartridges. This professional caulking gun can be used with all caulks sealants and adhesives. Connects to an optional compressor unit or your own compressed air supply. View our available air compressors GD1500 and GD4000.[]