SNIPER&reg; Bi-directional Integral Offset Scope Mount - 21mm Saddle Height, 38mm Offset 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 Airgun/.22 Dovetail Dimensions Reversible Locking Plate to Fit Full Range of Airgun/.22 Rails 38mm Bi-directional Offset Provides Extended and Comfortable Eye Relief