M1Surplus Aluminum Scope Ring Mounts - This item fits the 3/8 inch wide Dovetails on most RUGER AMERICAN 22 Rifle -- ( Note that some RUGER American rifles do not have 3/8 inch wide dovetail grooves and are thus not compatible with these rings - make sure to check your rifle and verify that it has 3/8 inch wide dovetail grooves running along the top ) -- / FEATURES / - Material: Aluminum - Color: Matte Black - Sold as a Pair ( Includes 2 rings ) - Overall Height: 2 inches - 1 inch internal diameter -Weight: Approx 1.1 ounce per rings -Optic Centerline Height: 1.32 inches - Fits 3/8 inch Dovetail rails - Sturdy design with 2 thick allen screws on each cap - Will accept scopes with 1 inch tube diameter and objective diameter up to 58mm - Clamps onto your dovetail base/mount and tightens with included allen head wrench - Provide strong and even clamping force to hold your scope in place - Brand New Item