Japanese Standard Sprockets
K Standard Sprockets A type (Japanese Standard)
K25A, K35A, K40A, K50A, K60A, K80A, K100A, K120A, K140A, K160A
NK Standard Sprockets B Type
NK100B, NK120B, NK160B
NK Standard Sprockets B Type ( Duplex) (Japanese Standard)
NK35-2B, NK40-2B, NK50-2B, NK60-2B, NK80-2B, NK100-2B, NK120-2B
High Grade Hardened Teeth Sprockets A Type (Japanese Standard)
HG40A, HG50A, HG60A, HG80A, HG100A, HG120A, HG140A, HG160A
High-Grade Hardened Teeth Sprockets B Type ( Duplex) (Japanese Standard)
HG40B-2, HG50-2B, HG60-2B, HG80-2B, HG100-2B, HG120-2B
NK Standard Sprockets C Type (Japanese Standard)
NK100C, NK120C, NK140C, NK160C
NK Standard C Type ( Duplex) (Japanese Standard)