... bub Japan 1. Japan standard 2. A B C Single Double type 3. 45 steel \ A3 Q235 ... sprocket, please see hardened teeth sprocket table. 25A, 35A, 40A, 50A, 60A, 80A, 100A, 120A, 140A, 160A.B ... 80B, 100B, 120B, 140B, 160B, 180B, 200B, 240B.C-typeWe can provide the following items as stock with quick ... 140C, 160C, 180C, 200C, 240C.Duplex B-typeDuplex C-typeThese sprockets(duplex) with one side or both hubs may ...