Check the listing for details. Laser Light Scope Ring Mount with Tri Picatinny rail + 30mm to 1" Reducer Insert. Condition: New. Listed at 8.99 USD. Laser / Scope Mount with 30mm to 1" Reducer Features ---Quality construction ---Compatible with most lasers, scopes, and flashlights with 30mm or 1" diameter. One 30mm to 1" reducer insert is included ---Lightweight, made of aluminum with black anodized matte finish ---Easy installation ---See through design ---Three side rails for mounting additional accessories ---Fits standard Picatinny and Weaver rails Specifications ---Dimensions: 2.5" (height) x 2.25" (width) x 25mm (depth) ---Weight: 3.2 oz (90g) ---Color: Black ---Material: Aluminum, Steel ---Ring Diameter: 30mm or 1" (with ring reducer) ---Fits: Picatinny / Weaver rails Items Included ---One (1) tri-rail scope/laser mount ---One (1) 30mm to 1" reducer insert ---One (1) Allen key.