Use Discount Strut Accessories Electro-Galvanized OMEGA Series 2-1/8" Tubes to retain, guide, protect & space line runs. Attached with 2 standard fasteners to any flat surface, the Omega Series clamp eliminates the use of special channels, providing a savings in both space & cost. Has a hanging load of up tp 400Lbs. The electro-galvanized coating is best for indoor, dry settings.