One New Aftermarket Replacement Water Temperature Gauge Fits JD Tractor Models: 2510, 5010 (For Gas & Diesel through 1968), 3020 (For gas & Diesel through 1968 (up to SN: 122999)), 4020 (For gas & Diesel through 1968 (up to SN: 200999)), 5020 (For Gas & Diesel through 1968 (up to SN: 024999)) Tech Info: 29" lead Max temperature is 250 degrees and minimum is 100 degrees (0.950" Thick) 2.045" HOUSING O.D. 2.324" BEZEL O.D. Inclues back light bulbs and holders Replaces Part Numbers: GAH30-0005, AR36383, R34263