1) Surface preparation:H.D.G, Pre-galvanized,Electrogalvanized 2) thickness: 1.0mm~3mm 3) back to back: 41x41,41x62,41x82 Strut channel1)Standard: 41*41, 41*212) thickness: 1.0mm~3mm.3) Length: according to customer's requirement.4) BH4141 (BH4125) is also available in stainless steel or other thickness on special order.5)Many different sizes shape of the slotted hole are availableStrut Channle ...