The Case IH 441857A1 Arm Assembly is an authentic OEM replacement part designed for various Case IH agricultural tractors. This component ensures proper functionality and fit within specified machinery, including models in the MX series (MX100, MX110, MX120, MX135, MX150, MX170) and 5000 series (5120, 5130, 5140, 5220, 5230, 5240, 5250). Weighing approximately 0.50 kg, it is manufactured to Case IH's quality standards for durability and reliable performance in demanding agricultural applications.