Water temperature sender sensor for up to 250 degrees F. 3/8" Mip water connection to eyelet loop or 1/4" wide EZ connection for wire. Compare to current or past OEM associations: Used on ACE truckmounts, White Magic A018 truckmounts, and El Diablo 730017 Truckmounts. Does not include the gauge - just the sending unit. **NOTE SOME EL DIABLO'S HAVE 1/2" PIPE THREAD AND EVEN 1/4" PIPE THREAD, PLEASE CONFIRM YOU SIZE." Pipe tread measurements are not the same as ruler measurements!