Specifications: We can offer all kinds of bearings for you, especially deep groove ball bearings And miniature ball bearings. Following are some information about our products: Material: Chrome steel, stainless steel, carbon steel and ceramic; Bore size:10~320mm; Tolerance: Abec-1~abec-7; Noise level: Z1~z4; Vibration: V1~v4; Grease: All kinds of grease; Seal: Open, z, zz, rs,2rs, rz. Packaging: Export standard