Part Number 6621 W 2 1 2 IN. GAUGES having (CAGE Code 41140) and FSC 4820 Valves Nonpowered in stock with ready to ship. Get an instant quote for 6621 W 2 1 2 IN. GAUGES Regulator Compressed Gas by Modern Engineering Co Inc. 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.