Sniper PT-25M4 1" Scope Rings for Picatinny Rail - Medium Profile (2-Piece) For scopes with 1" diameter tube Medium profile = 1.02" / 26mm ring center to base 6061-T6 aluminum alloy Holds zero, 4 top screws per ring. 2 rings per pack (in Sniper blister pack) Excellent value for money