... channel1)Standard: 41*41, 41*21,41x62,41x82...2)back to back: 41x41,41x62,41x82..3) thickness: 1.5mm~3mm.4) Length ... years in the manufacturing of Cable Trays,Cable Ladder,Wire Mesh and Cable Trunking,etc.>One of the most professional manufacturers ... reliable service by our ISO9001:2000 compliance. For off-the-shelf orders we can provide: >rapid quotes. >computerized estimates. >customized packaging ...