Part Number 21500 having (CAGE Code 1R8H0) and FSC 4720 Hose and Flexible Tubing in stock with ready to ship. Get an instant quote for 21500 Hose Assembly Air Duct by Mark Controls Corp Pacific Valve. 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.