●Includes 8 pieces adapters. Pressure washer adapter set is made of stainless steel. Anti-rust. High quality and hardness. ●Quick connect fittings are installed on pressure washer. Applicable for hose, wand, ball valve, etc. They make your cleaning job easier and faster. ●3/8 Inch quick connect fittings are great for snap. Very smooth to couple and uncouple. ●3/8 Inch NPT thread fittings are well made. Advanced technology to ensure the high precision of thread and no leakage. ●Max working pressure is 5000 PSI. Put them working on hot and cold water pressure washer.