The channel trolley track hanger support brackets allows you to hang the track and run the two or four wheeled trolley on the inside of the track. Fit for use with All 1-5/8" Series Strut Channels
Height: 3-3/4", Depth: 1-5/8", Top Mounting Hole: 9/16", Side Mounting Holes: 7/16"
Material:The trolley track hangers is made of galvanized solid steel.The maximum load for this item is 1,200 lbs
Inclued: Trolley Track Intermediate Support Hanger, 3/8" x 2-1/2" Bolts and 3/8" Nuts