... :1.5-3.0mm 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.4) Length ... . >real solutions for difficult applications. Our certificates: Our reference projects: Back to Back c channel