The Dayco 1.38” x 64” Poly Rib® Gold Label® Heavy Duty Serpentine Belt ensures you are Ready for the Road Ahead™ being engineered from intense temperature EPDM rubber and has a structure that utilizes a fiber-loaded composition to boost belt life and load carrying specifications. This heavy duty truck serpentine belt for your engine also provides superior resistance to high under hood temperatures and ozone contamination for the tension you need to power your vehicle. FleetPride is your First Click in Heavy Duty®.