Features: -Our parts washer pump features a standard SAE bolt pattern for easy installation. It is suitable for various gas pressure washers with horizontal engines -The power washer pump strengthens plunger hardness to reduce the chance of being damaged by impurities. It also improves wear resistance and prolongs the life of water/oil seals. Our replacement power washer pump has a sight glass for easy oil level inspection. By observing the oil level and the oil itself, you can easily check the oil level or see if water has mixed into the oil.