The Precise180 Endorphine Pro Surround is a polyurethane perimeter dart protector in Nordic Grey color. Designed to protect walls and reduce noise and marks when used with the Precise180 Endorphine Pro and other standard 18" (451 mm) diameter darts. Made as a single polyurethane perimeter with sound-absorbing felt applications. Compatible with Precise180 magnetic mounting/support systems and the OnePiece numeric ring design. An ideal accessory for competitive play and home settings to protect surrounding walls.