Detail Information: 4-screw High Profile "Tiger" Ring Precision Machined From Aircraft-grade Aluminum Alloy with Anodized Black Matte Finish Robust and User Friendly Ergonomic Quick Detach/Lock Lever Fully Adjustable to Fit on Any Picatinny Rail High Quality Synthetic Protective Tape Applied on Rings Internal Surface Tight Tolerance Control and Repeatable Positive Locking for Optimal Re-zero Performance Extensively Field Tested under Extreme Operations and Well Received by Field Experts and Law Enforcement Personnel Material: Steel/Aluminum Weight: 3.2 oz Rail Type: Picatinny/Weaver Profile Level: High Ring Diameter: 30mm Ring Width: 22 mm Max. Scope Outer Dia.: 74 mm Screws Per Ring: 4 A: 30mm B: 22mm C: 22mm D: N/A E: N/A