Precision Matched Rings: (Set of 2) 34 mm Tube (.92 Inches / 23.4 mm). Kept together to ensure the perfect fit and secure grip for your riflescope; the Vortex Precision Matched Riflescope Rings come in pairs to arrange your scope or flashlight on your favorite firearm. Rugged and lightweight; these Riflescope Rings developed by Vortex keep your scope level and precisely where it belongs with robust; Grade 8 fasteners and 7075 T6 billet aluminum. Made in the USA and serialized; the Vortex Precision Matched Riflescope Mounting Rings work with Picatinny mounts and offers the tight tolerance of .0005 that you demand for your favorite optics thanks to the Computer Numeric Controlled mill. Give yourself the best performance when you support your shooting accessories with the Vortex Precision Matched Riflescope Two Rings.