Frame It All One Inch Series 7' x 8' x 11" Composite Hexagon Sandbox Kit with Cover Eco-friendly timbers are made from recycled plastic and natural fibers. No toxic chemicals Allows endless design options. You can add on or reconfigure your sandbox at any time using existing or additional One Inch Series Frame It All components and accessories Low maintenance - timbers will not rot, warp, splinter or fade One Inch Series composite kits are made from 1" thick, rounded profile boards