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 & push-on hydraulic 4-jaw coupling. Rubber gripped grease tube & handle for easy grip. Features variable stroke for controlled grease volume. Half stroke gives low pressure & low volume, full stroke provides high pressure & high volume delivery. Accepts standard 400g cartridges. Model No. AK4402