1,shape:c channel 2,galvanized steel channel 3,slotted and plained 4,high quality 1,made of high quality material2,slotted c-channel3,galvanized struct channel4,high quality steel channel5,light and cheap 6,convenient in construction and save much labor7,various kinds of fitting can make up of many combinations8,strut channel size 41*41mm 41*21mm9,wall thickness:1.5mm ,2.0mm ,2.5mm other ...