Includes 5" extension with coupler. Lube capacity 16oz. bulk,/14.5oz. cartridge. Length is 15-1/2". The output is 1oz. per 33 strokes This grease gun has a rugged cast pump head for strength and durability. Its exclusive "flip over" follower allows a superior seal for either cartridge or bulk loading applications. Tough, resilient and impervious to lubricant. The extra-heavy follower spring insures for positive priming and uninterrupted pumping action. This is a one-hand operation with similar of Lincoln lever-type grease guns.