Sniper AG-30H4 Dovetail Rifle Scope Rings 30mm Dia. - High Profile for Airgun/.22 High Fits any Dovetail Rail / Mount Base (e.g. 3/8") 4 holding screws per ring for secure fit CNC machined aluminum, anodized matte black Reversible side locking plate holds rings tightly in place on rail and works on all sizes of Dovetail rail Holds zero