Highly durable cast iron pump head, features dual piston design for high volume performance. 3-Way fill with cartridge, bulk or manual capability. Supplied with rigid delivery tube and push-on hydraulic 4-jaw coupling. Rubber gripped grease tube and handle for easy grip. Features variable stroke for controlled grease volume. Half stroke gives low pressure and low volume, full stroke provides high pressure and high volume delivery. Accepts standard 400g cartridges.