Hi-Viz Magnetic Shotgun Sight-Narrow Vent Rib

“Hi-Viz Magnetic Shotgun Sight-Narrow, fits shotguns with vent ribs from 7/32″” to 21/64″”. 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.”