The Flame sight packs Hiviz brightness into a low-profile, compact package. It's the perfect sight for the shotgun shooter who knows he wants either a bright green or red bead - all the time - in all conditions. Its low-profile design offers durability, and is a great choice for the rigors of the outdoor hunting environment. Features: Fits most vent-ribbed shotguns with removable front bead Sight includes (5) screws in varying thread sizes to fit nearly any shotgun 3-56, 5-40, 6-48, 3mm x 0.5, 3mm x 0.6 LitePipe shape - round