Strut channel is a 3/4-square (or 3/4-rectangle for low-profile) shaped channel with folded-in ends and standardized design (sizing common to all manufacturers, incl. Unistrut, Superstrut, Kindorf, etc.), used primarily for support in structural, plumbing, electrical, fencing and other construction projects.
We stock both standard (square 1-5/8" x 1-5/8") and low-profile/half-channel (13/16" x 1-5/8") struts in various lengths.