Dayco 5080385 Poly Rib Serpentine Belt Advanced design EPDM rubber compound, loaded with aramid fibers, maximizes belt life and load carrying requirements while minimizing pulley misalignment noise EPDM rubber compound offers excellent resistance to high under hood temperatures and ozone contamination Solid rib design for additional strength and excellent pulling power on both light and heavy duty applications Specially formulated treated cord insures length and tension stability on heavy duty diesel engine drives for the life of the belt Limited Three Year Warranty