Shop for Aftermarket Sterling Acterra Fan Blades & Shrouds. Upgrade your truck 's cooling system with durable fan blades and shrouds designed for Freightliner and Sterling models with Mercedes engines. Options for All Needs: Choose from 30-inch 9-blade, 32-inch 11-blade fans, and specialty sizes. Reliable Brands: Featuring trusted options like BESTfit for long-lasting performance. Efficient Cooling: Keeps your engine at optimal temperature to prevent overheating. Keep your truck running smoothly with these high-quality cooling solutions!