16 gauge mild steel. Powder coated for indoor or outdoor use.

Item does not come with mounting hardware.

Product Dimensions (inch):

- 12 - 11.5" x 11"
- 15 - 14.5" x 13.75"
- 18 - 17.5" x 16.5"
- 24 - 23.5" x 22.25"
- 30 - 29.5" x 28"

12 - 11.5" x 11"12 - 11.5" x 11"15 - 14.5" x 13.75"15 - 14.5" x 13.75"18 - 17.5" x 16.5"18 - 17.5" x 16.5"24 - 23.5" x 22.25"24 - 23.5" x 22.25"30 - 29.5" x 28"30 - 29.5" x 28"