The 15mm size is appropriate for most SunJoe, Ryobi or Green works pressure washers.
This product can expose you to chemicals, including DINP/DEHP which is known to the state of California to cause cancer or birth defects or other reproductive harm, go to www.p65Warnings.ca.gov for more information. The products we sell are not intended for use in potable water systems and are only for industrial non-drinking water applications.