Automotive Poly-V Belts are engineered with the highest performance synthetic elastomers combined with reinforced fibers that ensures high heat resistance. These belts have the best transmission efficiency due to its characteristic multiple V-Ribs that delivers power from Engine Crank Shaft to Alternator/Dynamo, A/C Compressor, Power Steering Pump and Water Pump. Industrial Poly-V Belts, with its characteristic V-Ribs which are resistant to oil and temperature stress. The beltâ??s design allows us to deliver outstanding performance at high speeds on smaller diameter pulley.