Rear Mount Helm Pump 2.0 CU.IN | UFLEX UP33R Uflex USA Rear Mount Helm Pump 2.0 CU.IN | UP33R Rear mount Compact design Ball bearing piston race Built in lock valve for positive rudder lock Integral relief valve for over pressure protection 3/4 in. tapered stainless steel shaft Easily accessible lock valve and shaft seal for replacement Cast iron rotor for greater durability and longer life 1/4 in. NPT fitting for 3/8 in. tube Complete with elbow fittings Drop in replacement for Seastar helms Displacement revolution 33 cc 2.0 cu. inch Relief setting 70 bar-1000 PSI Max wheel diameter 28 in.