... .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: according to customer's requirement.5) BH4141 (BH4125) is also available ... difficult applications. Our certificates: Our reference projects: Back to Back c channel