Compatible with: All (4 & 6 cyl) Cummins 4-390 4T-390 4TA-390 (239ci, 4cyl) & 6-590 6T-590 (360ci, 6cyl) Diesel (turbo & non-turbo) engines in Case tractors and backhoes OEM Manufacturer Reliable cold weather starting Made in the USA NEW Top Quality 750w Heavy Machined Steel & Nickel Chrome Plated Block Heater. Compatible with: All (4 & 6 cyl) Cummins 4-390 4T-390 4TA-390 (239ci, 4cyl) & 6-590 6T-590 (360ci, 6cyl) Diesel (turbo & non-turbo) engines in Case tractors and backhoes. Made By the OEM Manufacturer for Case / Cummins This little powerhouse heater can be a hard to find part ..... and worth every penny in a cold climate when your equipment won't start without it.. This is the most powerful and durable block heater available for the Case/Cummins Diesels. The longer and more powerful copper heating element and solid heavy cast steel, nickel chrome plated base casting are just some of what sets this heater apart from the cheap Asian imports. Made for us right here in the good 'ol USA, NOT China! Not a flimsy stamped metal part ... thick solid metal, and nickel chrome plated for longevity & anti corrosion. Includes a new heavy gauge 6 foot power cord for 120V AC and detailed installation instructions. Replace an old heater... or install in an engine that never had one. A must for smooth safe engine starting below 30 degrees F. Standard mounting position for the Cummins Diesel Engine is in the Right side center core plug hole. Also replaces old block heater with LR1843 marking.