Female screw coupling connects to most common 1/4 in. & 3/8 in. Pressure washers. Ideal for connecting hoses together. Converts M22 metric thread size to standard thread size. 300 F. 5800 psi. Female screw coupling connects to most common 1/4 in. This product is Manufactured in China. This product meets customer requirement.PROP 65 WARNING: This product can expose you to some kind of chemical, which is known to the State of California to cause cancer.