Idler pulleysare used to adjust belt tension between the drivingpulley and other pulleys for air-conditionercompressors , powersteering pumps , superchargers , and alternators of automobiles.An Jiuh Men idler pulley is a combination of a high performancebearing and a light but strong pulley with high accuracy fitting.V-Ribbed Pulleys made by rotary-forming steel sheets areeconomical and light but still offer high reliability for auxiliarysystem for automobiles.V Pulleys are used to drive auxiliary components of automobilesand parts of various power transmission systems .Plastic Pulleys are designed to meet the need of total car weightreduction. Specially engineered plastics are used to provide durabilityunder severe environmental conditions.