Knight Ultra-Lite -Alloy Lightweight Scope Mounts

comes complete with screws Ring Height Rear Height Front Height Available for Main Tubes Weight (per set) Extra-Low  .300″ .300″ 1″ / 30MM 2.0oz / 2.4oz Low  .400″ .400″ 1″ / 30MM 2.2oz / 2.5oz Medium .500″ .500″ 1″ / 30MM 2.3oz / 2.6oz High .600″ .600″ 1″ / 30MM 2.5oz / 2.9oz Extra-High .700″ .700″ 1″ 2.7oz 1 The height is measured from the top of the action/ receiver to the bottom of the scope tube at the respective mounting location 2  Hole spacing measured center to center.   Front hole spacing: .500 inches (12.7mm) Rear hole spacing: .500 inches (12.7mm) Sold in pairs.