Black Swan's Caulking Gun is a tough, economical gun for contractors and home owners. Made of heavy gauge metal with a positive action plunger rod. Assures smooth operation. Uses any standard 1/10 gal. nozzle cartridges. Ideal for use with Black Swan Tub & Tile Caulk, Silicone Sealant, Smooth Putty, and Roof-Proof.