... welding bub Japan 1. Japan standard 2. A B C Single Double type 3. 45 steel \ A3 ... 40A, 50A, 60A, 80A, 100A, 120A, 140A, 160A.B-typeThese sprockets(simplex) with one side hub may be re ... 120C, 140C, 160C, 180C, 200C, 240C.Duplex B-typeDuplex C-typeThese sprockets(duplex) with one side or both ... request40SD, 50SD, 60SD, 80SD, 100SD.Stainless Steel B-typeThese sprockets are made of SUS304 are available for ...