The Dayco Double Cogged Accessory Drive Belt for is designed to provide consistent grip and prevent slipping. Its top and bottom cogs offer extreme flexibility around smaller diameter pulleys for longer life. The polyester cord can maintain tension throughout the belt's life and it meets or exceeds SAE J636 and SAE J637 specifications. With its raw edges, you can use the most force possible on pulleys that have a smaller diameter. FleetPride is your First Click in Heavy Duty®.