Feature●Size: The dart board backboard is 28in outer diameter, 17.75in inner diameter, 1-inch thickness, dart tips wont go through the backer.●Metarial: The square dart wall protection is made of EVA material and the square surface is covered with velvet.●Easy Installation: No tools needed , just splicing 4pieces dart backboards together. Does not take up space after disassembly.●Function: This dart board backer protects your wall from errant throws. The EVA surface is covered with velet, which has a protective effect on the tip of the dart.●Applicable places: Ideal for home or pub, game room,club, etc. Fits standard 17. 75 Inch And 18 Inch Bristle DartboardDescription