COX Caulk Gun: Cartridge, For Low to High Viscosity Materials Application Type, For 10 oz Container

Caulk cartridges fit into the barrel of these air-powered guns. The guns press their plunger against the end of the cartridge and squeeze caulk through the cartridge nozzle. They require less frequent cleaning than bulk or sausage pack guns because the cartridge minimizes contact between the caulk and the gun.