The Tractor Protection Valve is a direct replacement for Bendix 279000 & Midland KN34060, featuring 1/4 Inch NPT Tractor Emergency Port, 3/8 Inch NPT Tractor Service Port, and 1/2 Inch NPT Trailer Emergency and Trailer Service Ports. It is designed to fit most makes and models and should always be used in conjunction with PP-1, PP-3, or PP-7 style dash control valve. This valve provides practical and essential functionality for tractor and trailer emergency and service ports, ensuring reliable and efficient operation.