... -3.0mm 2.Size: customized 3.Low cost. Back to Back c channel1)Standard: 41*41, 41*21,41x62, ... 41x82...2)back to back: 41x41,41x62,41x82..3) thickness: 1.5mm~3mm. ... years in the manufacturing of Cable Trays,Cable Ladder,Wire Mesh and Cable Trunking,etc.>One of the most ... for difficult applications. Our certificates: Our reference projects: Back to Back c channel