Viper Wall Defender II Dartboard SurroundThe Viper Defender II Cork Dartboard surround is the easiest way to protect your walls from errant dart throws. The EVA Foam is 1 thick so you dont need to worry about darts penetrating through, but its also light enough to easily hang on your wall without any extra support. Each side of this dartboard surround has a thin layer of real cork for a clean and aesthetically pleasing look. Installation is incredibly easy, simply snap the segments together