Diesel Exhaust Fluid (DEF) Header with Long Hoses is a replacement array of sensors and heating element inside a DEF tank that is used to transfer from DEF tank a non-hazardous solution, which is 32.5% urea and 67.5% de-ionized water, to exhaust streams of telescopically extendable booms (telehandlers), rough terrain forklift, material handlers. This DEF Header kit is designed for use on JLG telehandlers 642, 742, 943, & 1043 all serial numbers.