The Dayco Poly Cog belt is 96" long and .82" wide with six ribs. This grooved design runs cooler and with a lot less noise from slippage. This belt is designed to perform better under overload situations. Backside Material Rubber Compound Desc EPDM, Aramid Reinforced Effective Length (in) 96.06 Metric Part 6PK2440 No of Ribs 6 Rib Profile W Profile Rib Type Standard Routing 7-70 Thickness .169 Top Width (in) .82