UFlex UP39R Rear Mount Helm PumpRear mount helm pump with 2.4 cu. in. displacement/revolution. Built-in lock valve for positive rudder lock and integrated relief valve for over-pressure protection. White bezel included.Features Compact design; 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; Complete with 90 adjustable fittings for 3/8" tube; KIT F (optional): remote fill adapter; Specification Mounting: Rear mount; Displacement/revolution: 39 cc- 2.4 cu.in; No. of pistons: 7; Relief valve setting: 70 Bar - 1000 PSI; Max. wheel diameter: 710 mm (28"); Weight: 5 kg (11 lbs);