UP28F - Front Mount Helm Pump Features: 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 rotor for greater durability and longer life 1/4" NPT fitting for 3/8" tube Complete with elbow fittings 5 pistons