Check the listing for details. 4PCS Pressure Washer Adapter Set Quick Connect Kit Stainless Steel 5000 PSI. Condition: New, Made in China. Listed at 20.36 USD. 1.The adapter set allows you to easily convert M22 thread-on couplings to a 3/8 inch quick connector, making your pressure washer more versatile and efficient. 2.making it easy to connect and disconnect. It can handle working pressures up to 5,000 PSI 3.The adapter set is compatible with a wide range of guns, hoses, and pumps, making it easy to connect and disconnect. It can handle working pressures up to 5,000 PSI. 4.The adapter set allows you to easily convert M22 thread-on couplings to a 3/8 inch quick connector, making your pressure washer more versatile and efficient.Universal Compatibility: The adapter set is compatible with a wide range of guns, hoses, and pumps Please note that the inside diameter is 14mm, not 15mm. .