NextStone Stacked Stone Panel Walnut Brown (5 Panels Per Box) (18.15 Sq.Ft. Per Box) Matching Accessories: Sandstone Ledger & Ledger Corner, Window and Door Trim: Brown Matching Corners: Stacked Stone Outside Corner Walnut Brown; Sandstone Outside Corner Brown 18.15 Square Feet Per Box Durable and Lightweight. Quality Polyurethane cast from real stone Certified Green, Easy to Install, Energy Savings with Increased R Value