This is a Lot of 10, Used Aluminum Top Hat channel. The measurements are from left to right in the main photo: 1-1/2" x 1-1/2" x 2-1/4" x 1-1/2" x 1-1/2". They are approxaitly 20" long. They are approx. 14ga. thick.These pieces were taken out of a Satilite Antenna Dish that was decommishioned. They will have holes in assorted spots as they were fastedned togeather with screws.