NcStar 12ga Shotgun Tri-Rail Weaver Style Mount for 1" Mag Tube SPECIFICATIONS BRAND: NCSTAR CA PROP 65: YES MATERIAL: ALUMINUM RING & MOUNT FINISH: ANODIZED RING & MOUNT PIECES: 1-PIECE RING & MOUNT TYPE: WEAVER STYLE DESCRIPTION 1" Shotgun Magazine Tube Mount Mounts onto 12 gauge Shotgun Magazine Extension tubes Allows the shooter to mount accessories to their shotgun like flashlight and lasers 5 different angled rails to mount accessories to. The standard 3,6, and 9 o'clock positions with the 4-5 & 7-8 o'clock Black Anodized Aluminum Construction Length: 1.4" Weight: 1.4 oz.