UP28R Rear Mount Helm 1.7 cu. 3/4" Tapered Stainless Steel ShaftFeatures: Available in four different displacement sizes Compact design Ball bearing piston race Built-in lock valve for positive rudder lock Integral relief valve for over-pressure protection 3/4" tapered stainless steel shaft Easily accessible lock valve and shaft seal for replacement Cast iron cylinder rotor for greater durability and longer life 1/4" NPT fitting for 3/8" tube Includes 90Adeg adjustable fittings for 3/8" tube and white bezel UP45R pump is ideal for double cylinder outboard applications UP45 pump is available also for inboard application X68 (optional) - 40894Z Chrome bezel KITF (optional) - 39664Y Remote fill adapter Specifications: Mounting: Retro-cruscotto Displacement/Revolution: 28 cc-1.7 cu in # of Pistons: 5 Relief Valve Setting: 70 Bar - 1000 PSI Maximum Wheel Diameter: 710mm - 28" Weight: 5kg - 11 lbs.