We Carry Replacement Rod for Condux, Jameson and DCD Designs Duct Rodders and Fish Tape. We have the following sizes 1/4", 3/16", 5/16", 3/8", 7/16", 1/2", 9/16", 5mm, 6mm, 8mm, 11mm and 13mm. Most come unmarked but you can purchase replacement rod with footage marks or metric marks and in some cases traceable rod. Depending on what Kind and brand of duct rodder you want the sizes available may very. in most cases we carry sizes from 50ft to 1500ft.