Sierra - V-Belt - 15370High strength synthetic cords resist shockload failure. The compression section is a special rubber compound that assures smooth and even transfer of load forces to the cords. Cogs are molded to precise engineering tolerances to improve flexibility and maintain cord support. Cog geometry provides a large area for air circulation to keep the belt cool and prevent damaging heat build up in the cushion section. Rubber edges maintain positive, no slip