Compact design Built-in lock valve for positive rudder lockIntegral relief valve for over-pressure protectionCompatible with Teleflex SeaStar cylinders, hoses and oil3/4" tapered stainless steel shaftEasily accessible lock valve and shaft seal for replacementConvenient front of dash fillAdjustable Boss Fittings compatible with Kit OB and Kit OBSVS hose kits and SeaStar hosesRelief valve pressure: 1000 PSI