The Dayco® Double Sided Poly Rib® Belt is designed for multiple accessory drives requiring the transmission of power from both sides of the belt. Dayco® was first to introduce the double sided serpentine belt to the automotive aftermarket. The Dayco® Double Sided Poly Rib Belt is manufactured from an extreme temperature EPDM rubber and features a construction that uses a highly fiber loaded compound on both sides of the belt to maximize load carrying requirements while minimizing pulley misalignment noise. In addition, the processes utilized in the production of this belt employs advanced manufacturing techniques allowing the overall belt thickness to be minimized...ultimately resulting in a cooler running belt. The Dayco® Poly Rib double sided belt meets or exceeds SAE J1459 and SAE J2432 specifications.