The Killflash Anti-Reflection Device (ARD) features a distinctive aluminum hex honeycomb pattern, expertly designed to eliminate bothersome sun flashes, glares and reflections on your Romeo5 or 1x20mm 28mm outer diameter objective lips red dot sights, item ensures clear visibility and accuracy during hunting or shooting outdoors. PP case, aluminum hex honeycomb pattern net, lightweight, durable and reliable. Secure convenient snap fit design, toolless quick installation or removal.