Etched Lightning (TM) Captured In Wood. Branching High Voltage Electrical Discharge Creates One-of-a-Kind Lichtenberg Figure Artwork Of Elegant Bonsai Style Zen Patterns Burned Into Wood. EVERY PIECE IS UNIQUE. Each electrical discharge pattern burned into the wood is unique. No two pieces are exactly alike. ETCHED LIGHTNING. The branching electrical discharge patterns have been described as many things, including Zen like patterns, Bonsai Trees, Fractal patterns. EASY TO DISPLAY. The wood is 4" x 4" square, anywhere between 1/2" to 3/4" thick. Making it easy to fasten a wall hanging or picture handing clip to the backside for easy display. GREAT GIFT. This is a perfect gift for the technical and science inclined person UNFINISHED WOOD. The product is left in its raw wood condition making it easy to color stain the wood or seal it with varnish.