Size: 2-1/8" Wide X 7-1/4" Long X 1-13/16" TallThickness: 1/4" Hole Size: 9/16"Material: SteelFinish: GalvanizedFor Use With Any Kindorf, Unistrut And Many Other Strut Fastening SystemsFor Use With 1-5/8" X 1-5/8" Channel Only