Heavy-duty air brake deep reduction valve switch for manual transmissions – optimized for commercial truck transmission control Features 1/8" NPT supply port for secure, standardized thread connection in air brake and transmission systems Rugged design ensures long-lasting durability and reliable valve actuation under demanding conditions Compatible with major OEMs including Fuller, Freightliner, Navistar, Timken, and Genuine Newstar Package includes 1x Reduction Flipper Switch Valve – World American quality backed by OE-grade reliability