... steel with advanced heat treatment,and all size of sucker rod available in grade C,D,KD,H, L,HY and ... is one of the main producers and providers of sucker rod in China, and get certificate of Authority to Use Office ... , L,HY and Polished roddiameter(mm) 5/8"3/4 "7/8 "1 " length(mm) 25' or 26.25' 25' or ...