... Retainer: J, K, M, MA, MB. NSK Adapter Sleeve NSK Adapter Sleeve,NSK miniature ball bearings, NSK deep groove ball bearings, ... bearings, Luoyang LYC bearings, and other major brands. NSK Adapter Sleeve model numbers:Adapter Sleeve (H200): H204, H205, H206, H207, H208, H209 ... H315, H316, H317, H318, H319, H320, H321,H322Adapter Slee Adapter Sleeve ve (H3100): H3120, H3122, H3124, H3126, H3128, H3130, ...