BMI Engine Block Heater Compatible with: Kubota Tractor M B & L Series 3, 4 & 5 cyl Engines Compatible with: most Kubota M, B & L Series tractor engines 3, 4 & 5 cyl with 3/4" or 1" NPT port in side of block Same Heater as the Kubota Dealer Offers Please verify your engine has the 3/4" NPT port to accept this heater before ordering Made in the USA! New Cord Included