Features: Suitable for most standard dartboard, easy to assemble and does not require any tool. Make of EVA foam materials, which will not have any resistance to dart. No additional fixing or mounting required. Simply attach it to your wall for a stable barrier. Our dartboard wall surround not only protects your wall and dartboard but also provides enhances soundproofing during dart game. The dartboard surround consists of 4Pcs and can attach to the dartboard quickly, it stays securely on the disc even with powerful throws. Specifications: Materials: EVA Color: Black/Redness/Green/Blue/Tangerine/Gray Outer diameter: about 68cm/26.77inch Inner diameter: about 45cm/17.72inch Thick: about 2cm/0.79inch Package Includes: 1Pc Dart Board Surround Rings note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.