UTG 30mm/Single Piece Max Strength Hi Profile Picatinny Ring Single Piece 30mm Picatinny Ring Mount with 1" Saddle Height to Provide a Co-witness Option for Many Popular Magnifier or Dot Sight Models Precision Machined From Aircraft-grade Aluminum Alloy with Anodized Black Matte Finish, High Quality Synthetic Protective Tape on the Inside User Friendly Ergonomic Twist Lock Fully Adjustable to Fit on Any Picatinny Rail Tight Tolerance Control and Repeatable Positive Locking for Optimal Re-zero Performance Purchase 2 Units to Mount a Conventional Scope with Up to 80mm Objective Diameter and Proper Tube Clearance for the 25mm Ring Width