Part Number YMD4939 having (CAGE Code 70433) and FSC 4820 Valves Nonpowered in stock with ready to ship. Get an instant quote for YMD4939 Valve Linear Directional Control by Appleton Marine. Fill the form below with your desired order quantity, targeted price and the expected order-fulfilment date. Our dedicated account manager will get back to you within 15 minutes.