bicycle we can produce outer diameter 4.8mm ,5.0mm,. and more bigger size we all can make from 4.mm to 13mm. bicycle cable, also called cable outer, outer cable, we can produce from a diameter 5.0mm to 12.0mm.color: black, blue, grey, yellow.we have ISO9001material of cable outer cable:outerside: PVCmiddle: 70#--75# steelinner: PE tube (1P without inner tube)