【Product loads】 The channel support bracket is engineered for framework systems capable of sustaining a maximum load of 1300 lbs. 【Product compatibility】 Compatible with all 1-5/8" Series Strut Channels, including hoists, punching bags, rolling doors, cart hangers, etc. 【Product Type】 The Channel Trolley Track Hanger Bracket is constructed from stainless steel, offering superior corrosion resistance. Silver Finish: Electro-Galvanized Zinc; ASTM B633, Type III. 【Product Material】The Channel Trolley Track Hanger Bracket Is Made Of Stainless Steel, Offering Enhanced Corrosion Resistance. The Metal Surface Is Untreated,Which Is More Sturdy, Not Susceptible To Erosion From Paint Or Polishing.