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 10.25"
- 15 - 14.5" x 13"
- 18 - 17.5" x 15.75"
- 24 - 23.5" x 21"
- 30 - 29.5" x 26.5"

12 - 11.5" x 10.25"12 - 11.5" x 10.25"15 - 14.5" x 13"15 - 14.5" x 13"18 - 17.5" x 15.75"18 - 17.5" x 15.75"24 - 23.5" x 21"24 - 23.5" x 21"30 - 29.5" x 26.5"30 - 29.5" x 26.5"