The Case-IH 111899A1 is a genuine OEM regulator designed for a wide range of Case-IH agricultural equipment. This essential electrical component ensures proper voltage regulation and reliable performance across numerous models. It is compatible with Case-IH MX series tractors (MX100, MX110, MX120, MX135, MX150, MX170), 5100, 5200, 7100, 7200, and 8900 series tractors, 1600, 2100, and 2300 series combines, 1800, 2000, 2100, and 2500 series cotton pickers, 8800 series windrowers, and 8810 forage harvesters.