1.CE and ISO certification 2.Produced by German KAMAT technology 3.Medium is water or oil 4.Change plunger is simple,quick ... deceleration ratio:i=3.652Motor power:34,45,55,75KWMedium:water or oilMaterial of liquid end: Carbon steel, SS420, SS304 or ... style,simple and reliable5.Simple operation,high strength, low noise.If you have any questions,please feel free to contact me. High pressure water pump