Dayco Poly Rib Belt, Premium The Dayco Poly Rib Belt is manufactured from an extreme temperature EPDM rubber and features a construction that uses a highly fiber loaded compound to maximize Poly-V Serpentine Belts | Dayco Aftermarket North AmericaThe Dayco poly-V aramid serpentine belt has been engineered to maintain a quiet, vibration-free belt drive system. Unlike polyester-corded belts, the Dayco poly 
Dayco 5060885 Poly Rib Belt , Black The Dayco Poly Rib belt is 88. 5" long and . 82" wide with six ribs. This grooved design runs cooler and with a lot less noise from slippage.