Detail Information: 4-screw High Profile "Tiger" Ring Precision Machined from Aircraft-grade Aluminum Alloy with Anodized Black Matte Finish User Friendly Quick Detach Lever Lock with Full Adjustability to Fit on any 9-11mm Rail Innovative Robust Recoil-proof Spring Tensioned Stop-pin for Rails with or without Recess Holes Spring Tension Controlled Locking Plate with Steel Insert Guarantees Most Secure Installation 2x Rings Total in 1 Set Material: Aluminum Weight: 2.8 oz Pieces: 2 Rail Type: .22/Airgun Profile Level: High Ring Diameter: 1 Inch Ring Width: 22 mm Max. Scope Outer Dia.: 65 mm Screws Per Ring: 4 A: 1 Inch B: 22mm C: 20mm D: N/A E: N/A