Veradek Metallic Series Corten Steel Small Cube Planter, 18-Inch Height by 17-Inch Width by 17-Inch Length, Rust (CUVSMCS) Planter fully seam welded by expert craftsmen using thick gauge corten steel Raw corten steel finish develops a rich rust patina over time Insulated for root protection during harsh winter and summer months Riser feet allow for optimal drainage and aeration