Designed for high mileage multiple-accessory drives, Developed through extensive laboratory and actual road mileage testing, this unique rib profile has been specifically Deco? engineered to conform to high mileage, worn or misaligned drives without a sacrifice in quiet, long-lasting performance. The "profile cut into the tip of each rib makes the tip more flexible and eliminates belt chirp when the belt enters a worn or misaligned pulley. Constructed with Aramid reinforced EPDM compounds, the Deco? ??W?? profile belt delivers more than OE required quality...it delivers the solution to troublesome drive problems. Deco? Poly-Rib? Belts meet or exceed SAE J1459 and SAE J2432 specifications. This Poly-Rib? Belt is another Deco? product proudly made in the USA.