VERY100 1pc High Profile 30mm Scope Ring 21mm Picatinny Weaver Rail Mount for Flashlight These are High Profile Scope Rings; Type: High Profile(31mm) These scope rings fits on 21mm Picatinny weaver rail mounts Rings are for a solid mount Scope rings are for standard scopes 30mm scope tube These are very high quality scope rings for you rifle, and make an excellent upgrade