Shoot-Thru Scope Covers are made from optical grade polycarbonate lenses so the view through your scope is crystal clear. * Shoot-Thru Scope Covers are designed to fit a variety of similar sized scopes. * Inside the cover there is a 60º taper to center on the scope and promote a good seal. * Best fit is obtained when the scope fills most of the cover. Made in USA. * Scope Covers are very easy to use, perfectly clear, interchangeable lenses and never interfere with the perfect shot.