Hi-Viz Ultra Narrow Magnetic Shotgun Front and Rear Sight Combo Pack. Fits shotguns with ribs from .171" to .265" (11/64" to 17/64") (4.2mm to 6.7mm). Rear sight is fully adjustable and features two Green, non-replaceable LitePipes. Front sight includes one Green and one Orange replaceable LitePipe. C200-2