Die-cast head with 4"" rigid pipe extension and coupler (G113 equipped with 18"" flex hose extension and coupler). One-hand operation. Uses standard 14 oz. cartridge or can be bulk filled. Features heavy-duty steel barrel, electro-static, corrosion-resistant finish and non-slip knurling. Posi-lock follower rod with T-handle provides sure-handed grip and easy filling at any position.