Higoo 1" Tactical High Profile Airgun Ring Mount, See Thru 1 Inch Dual Ring High Pro Rifle Scope Mount with 20mm Weaver Rail Fits most Weaver and Picatinny Rails. Accepts most scopes and red dots that have a 25.4mm tube diameter. Integral Design Material: Aluminum. Rail width: 20 mm/0.79". Inner diameter: 25.4 mm/1".