Picatinny Rail Scope Mount Rings

Durable all metal construction Lightweight, made of aluminum with black anodized matte finishEasy installation (tool included)Compatible with most scopes or barrels, with 1" (25mm) or 30mm diameter30mm to 1" ring adapters included40mm long standard rail for attaching a wide variety of accessories Specifications Dimensions: 44mm x 40mmWeight: 40g (1.5oz)Material: Aluminum, SteelRing / Barrel Diameter: 1 inch (25mm) with adapter (included) 30mmFinish: Black MatteRail Dimension: 20mm x 45mm (length) Items Included One (1) barrel / scope mount with extended rail baseOne (1) 30mm to 1" ring adapterOne (1) Allen key