Lever-Action Heavy-Duty Grease GunComes with handle grip and vent valve for purging air from gun. It's designed for rough treatment on the job with a cast iron pump head, precision fit plunger and extra heavy follower spring. Variable stroke/variable pressure: short stroke-high pressure: long-stroke high volume. Follower is set for cartridge use. Extension Type: 62028, 6 in. Extension Tube, 5852 Coupler; Handle Type: Lever; Length: 21 3/4 in; Lube Capacity: 16oz. Bulk/14.5oz. Cartridge; Type: Lever; Weight: 4.24 lb.