... . High quality, ISO9001:2008 2. OEM service and designed service offered 3. High quality! Ball Bearing:1. Material: Gcr15 Chrome steel, Stainless ... steel or Carbon steel2. Brand: TINMY3. High quality with very smooth feeling, quality ... ,sprocket,track link ,bolt & nut, bucket ,teeth ,adaptor,muffler etc . Ball and socket Bearing