Graco Piston Valve 239937 239-937

This piston valve will work with your FinishPro 390/395, 190ES, 210ES, 390, Ultra 395/495/595, GMAX 3400, LineLazer 3400, GMAX 3400 Standard Series, GMAX 3400 Standard Series LoBoy, Ultra Max II 1595 Standard Series CSA, Ultra max II 1595 ProContractor Series CSA, GMAX II 5900 Standard Series, GMAX II 5900 Standard Series Lo-Boy, GMAX Ii 5900 ProContractor Series, GMAX II 5900 Standard Series Convertible, GMAX II 5900 Standard Series convertible Lo-Boy sprayer.