Feature a 32mm / 1.25in Bottom to Ring Center, Fit Weaver and Picatinny / Dovetail Mount a Cantilever Mounting Solutions Give You Optimal Eye Relief and Rail Space a Made from Rugged Aluminum Alloy, Stable and Durable, Easily Installed Specification Ring Dia: 30 mm Height: 54.5 mm / 2.1 in (Weaver Rings) , 52.0 mm / 2.1 in (Dovetail Rings) Central Height: 32 mm / 1.2 in (Bottom to Center) Material: 6061-T6 Aluminum Alloy Weight: 101.3 g / 3.6 oz (Weaver Rings) , 94.6 g / 3.3 oz (Dovetail Rings) Mount: Weaver and Picatinny / Dovetail Finish: Matte Black Items in the Package: 1 pc T15 Torx Wrench Video Size