UTG 1"/2 Pcs. Medium Profile Air gun Rings w/Stop Pin Features: - Precision Machined from Aircraft-grade Aluminum Alloy with Anodized Black Matte Finish - Complete with Stop-pin for Rock Solid Application - Ring Base Designed with Locking Hex Screws to Tightly Fit on Mounts with Air gun/. 22 Dovetail Dimensions - Reversible Locking Plate to Fit Full Range of Air gun/. 22 Rails Specifications: - Material: Aluminum - Weight: 1. 65 oz. - Pieces: 2 - Rail Type: . 22/Air gun - Profile Level: Medium - Ring Diameter: 1" - Ring Width: 21 mm - Max. Scope Outer Dia. : 53 mm - Screws Per Ring: 4