The John Deere AKK33737 Nozzle Holder is an original equipment manufacturer (OEM) part designed for precise fuel injection in various John Deere tractor models. This genuine component ensures optimal engine performance and fuel efficiency. It is compatible with a wide range of John Deere 840, 920, 940, 1020, 1030, 1040, 1120, 1130, 1140, 1630, 1640, 1830, 2020, 2030, 2040, 2120, 2130, 2140, 2250, 2450, 2650, 2850, 3030, 3040, 3050, 3120, 3130, 3140, 3350, 3640, 3650, 4040, 4050, 4240, 4250, 4440, 4450, 4640, 4650, 4840, 4850 series tractors, maintaining the integrity and reliability of the fuel system.