* RD-7310A DIA(mm): 1.5, Length(M): 1.5 * RD-7310B DIA(mm): 2.0, Length(M): 1.5 * RD-7310C DIA(mm): 2.5, Length(M): 1.5 * RD-7310D DIA(mm): 3.0, Length(M): 1.5
