NcStar Vism Tactical Rings 30mm 1.3" Height 2/ct SPECIFICATIONS BRAND: NCSTAR CA PROP 65: YES MATERIAL: ALUMINUM RING & MOUNT FINISH: ANODIZED RING & MOUNT PIECES: 2-PIECE RING & MOUNT RING HEIGHT ACTUAL: 1.30" RING & MOUNT TUBE DIAMETER: 30MM RING & MOUNT TYPE: PICATINNY/WEAVER STYLE DESCRIPTION New Tactical Series of 30mm Scope Rings. 30mm Scope Tube Diameter Rings with removable 1" inserts. Mounts onto Weaver/ Picatinny/ MIL-STD 1913 type rails. Hexagon Shape mounting nut, with holes for torquing with Allan key wrench. Black Anodized Aluminum Construction Rings sold as a Pair. Optic Centerline Height: 1.3" Ring Overall Height: 2.2" Weight: 2.4 oz. Mounting tool included.