The Rockford raised garden bed is totally non-toxic. Nothing can leach into the plants growing in in these beds, which makes it safe for growing herbs, vegetables and fruit. These raised beds are stackable if you need the depth for deeper rooted plants. The maple color is not a stain or surface preperation so the color won't wash off or oxidize and turn gray over time. Can be painted or stained. Moisture and humidity resistant, rot proof, and insect proof. Holds 9.71 cu ft of soil. 4'x4'x8"