Hi-Viz Magnetic Shotgun Sight-Ultra Narrow Vent Rib

“Hi-Viz Magnetic Shotgun Sight-Ultra Narrow, fits shotguns with vent ribs from 11/64″” to 17/64″”. Great for sub-gauges. Shoot better on the range or in the field with a Hi-Viz sight. Kit includes multiple tubes in red, two-tone, and green in two diameters.”