A QR1C-type quick release valve with an integral double check valve and 0 PSI crack pressure, with 3/8" NPT delivery and 1/4" NPT supply and balance ports. This valve is used in a truck's air brake system to allow rapid exhaust of air from the brake chambers directly at the axle, speeding up brake release rather than routing air back through a long line to the treadle valve. It's a Bendix QR-1C style aftermarket replacement, cross-referenced to Bendix numbers 289714 and 289714N, IHC 1676745C1, and Mack 25175160.
