Type QR-1C Quick Release Valve designed for heavy-duty air brake systems; 0 PSI differential with 0.375-inch delivery port diameter for reliable and fast brake release performance in commercial vehicles. Precision Port Sizes: Supply port diameter 0.25 inch, delivery port diameter 0.375 inch, balance port diameter 0.25 inch; NPT thread type ensures secure connection and leak-free operation. Durable and Compact Design: With a 2.68-inch height and robust NPT-threaded ports, this valve withstands demanding conditions while fitting easily into compact spaces. Versatile Application: Suitable for trucks, buses, and trailers, this valve is compatible with air brake systems across and Compatible with Multiple Brands and Applications, replacing Bendix, Haldex, Meritor, Tectran, Mack, Freightliner, Navistar, Volvo Truck, Wabco, Automann, Euclid. Reliable Construction: Built with high-quality materials, this QR1C valve provides long-lasting durability, maintaining optimal functionality under high-pressure conditions. and Replaces Popular Part Numbers: Bendix 289714, Haldex KN32041, Meritor R955289714N, Tectran 14477, Mack 20QE2288, Freightliner 729013401, Wabco 4735050030, Genuine Newstar S-9749.