U-Bolt Size: 3/8" Dia. X 12-3/8" Wide X 3-3/4" LongPlate Size: 3" Wide x 2-3/8" LongPlate Thickness: 1/4"Material: SteelFinish: GalvanizedFor Use With Any Kindorf, Unistrut And Many Other Strut Fastening SystemsCan Be Used With Both 13/16" Wide And 1-5/8" Wide Channel