Carrier frame to fit the 3M Versaflo Over-visor M-967N to 3M Versaflo M-Series Helmets, M-307 and M-407.Carrier frame to fit Over visor to select 3M Versaflo M Series Helmets. Low profile, designed specifically for use with M 307 and M 407 Helmets. For use with 3M Versaflo Gold Over visor M 967N.