Specification： Extending the lifespan of waterseals/oil seals Ceramic Parts Hardness900hw Stainless Stee Parts Hardness50 hre Reduce plunger damage caused by impurities Reduce wear between plunger and seal Improve durability performance Integrated Pump Head:Forged brass with high strengthhigh-pressure resistancebetter sealing High Pressure Hose Quick Connect:More convenient to installwater pipes Crankcase:Greater space with sight glassto check oil leve Features： .