The product is an OEM Mack fan blade with the manufacturer part number 2MH460. This fan blade is designed specifically for Mack commercial trucks, providing high-quality and reliable performance. Perfect for replacement or upgrade, this fan blade ensures optimal cooling and efficiency for your vehicle, helping to extend its lifespan and maintain its overall functionality on the road. Fan Blade 2.56in Fan Pilot Diameter,9 Blades, 24in Fan Blade Diameter, Material: Fiberglass