4-screw Low Profile "Tiger" ring. Precision machined from aircraft-grade aluminum alloy with anodized black matte finish. 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. Material: Aluminum/Steel Profile Level: Low Ring Diameter: 1 Inch Ring Width: 18 mm Saddle Height: 10 mm