A B C singgle double Sprocket welding bub Japan 1. Japan standard 2. A B C Single Double type 3. 45 steel \ A3 Q235 A-typeA-type sprockets (plate wheel ... .Stainless steel sprockets are available for wet condition2040B, 2042B, 2050B, 2052B, 2060B, 2062B, 2080B, 2082B, SUS2040B, SUS2042B, SUS2050B, SUS2052B, SUS2060B, SUS2062B. A B C ...