
Truck Parts Inter Differential Ring Axle for Benz 3553503039 21/28 Crown Wheel Pinion for Truck Transmission. Premium Material Composition: Constructed from 20Crmo, 40Crmo, 42Crmo, and 20CRMNTI for superior wear resistance. Advanced Heat Treatment: Carburized to HRC58-62 hardness with 12-hour treatment for extended durability. Comprehensive Quality Control: Strict inspection at every stage from forging to final packaging and rust-proofing. Custom Branding Available: Customers can customize the brand on unified packaging and cartons. Robust Packaging Solution: Thickened wooden boxes for heavy goods with foam and inner bag protection. Direct Factory Pricing: Manufacturer direct sales ensure prices lower than market value. Global Export Experience: Over 10 years in auto parts with complete sea freight documentation support. Sample Service Offered: Free samples available, though freight costs are not covered.