This is a Bedford Piston Valve (stainless steel housing & carbide ball seat) for Graco 23:1 Monark & EH 333 Sprayers. This quality Bedford part replaces Graco Part Number 223-591.
Bedford parts are engineered and manufactured in the USA to rigid specifications to duplicate the quality, appearance & performance characteristics of the Original Equipment Manufacturers' parts. With Bedford parts you can be assured of quality and trouble-free performance.