Product Details: The Dayco Double Cogged Accessory Drive Belt is the perfect choice for those who need a reliable and durable belt. The black, raw edges on the construction ensure constant grip to prevent slippage, while the top and bottom cogs around pulleys of lower diameter provide extreme flexibility for a longer life. The polyester cord is the best cable for maintaining tension across the belt's course, surpassing SAE J636 and J637 requirements. With this belt, you can use the most force possible on pulleys that have a smaller diameter. FleetPride is your First Click in Heavy Duty®.