Higoo 25.4mm Dual Rings Mount/1" Scope Mount/12 Gauge Mag. Tube for 1" Flashlight/Laser 1-Inch Flashlight or Laser Mount Mounts to a 1-Inch scope tube or 12 Gauge magazine tube Dual Rings design make this mount suitable for most combat situation Work on Savage Tactical 12 Diameter: both 25.4mm (one inch)ring ,Length: 90 mm (3.5 inch) ,Weight (net): 45g (1.6 ounce)