... quality. Main types: Deep Groove Ball Bearings ,Cylindrical Roller Bearings, Self-aligning ball bearings, Tapered Roller Bearings, Thrust Roller Bearings, Spherical Bearings, Needle Roller Bearings, Linear Bearings, Miniature Bearings.... TianRui bearings are generally used ... .Noise inspection7.Appearance inspection8.Rust prevention9.Product packaging 6200 series Deep Groove Ball Bearings 6306