ZHUJI WEILIN MACHINERY FACTORY BRAND, Famous in the world QUALITY, Excellent Mechanical Properties GOOD SERVICE Truck Slack Adjuster High Quality Material: 45# & 40CrStrict control inspection To insure the worm shaft, worm wheel and the body working in the best condition, the most suitable material is applied to different part according to their function. 05.174.52.61.0 Brake Slack Adjuster