Product Details: The Dayco 1.66” x 85.83” Poly Rib® Gold Label® Heavy Duty Serpentine Belt ensures you are Ready for the Road Ahead™, being engineered for power from maximum temperature EPDM, Aramid reinforced rubber and boasts a highly fiber-loaded compound to maximize belt life. This heavy duty truck serpentine belt for your engine also features a specially formulated treated cord that guarantees length and tension stability guaranteeing resistance, reliability, low noise and a longer service life. FleetPride is your First Click in Heavy Duty®.