FIRE WOLF High Profile See Through 25.4mm Scope Rings 21mm Picatinny Weaver Rail Mount 2pcs These are High Profile Scope Rings; Type: High Profile(24mm) These scope rings fits on 21mm Picatinny weaver rail mounts Rings are for a solid mount Scope rings are for standard scopes 25.4mm scope tube These are very high quality scope rings for you rifle, and make an excellent upgrade