Use Garmins 2.1 L pump kit with your GHP 10 system to pump hydraulic fluid from the steering cylinders to the "steering wheel" at the helm. For boats with steering ram capacities of 10-24 cubic inches. Can only be used with a balanced-cylinder steering system. Compatible with Power Assist (Teleflex Sea Star, Char Lynn, HyDrive, Latham). Dimensions: 16 1/2"W x 6"H x 7 1/2"D.