Franterd Tactical 1&rsquo;&rsquo; Offset Picatinny Weaver Rail Mount 4 Flashlight with Quick Release Aluminum Alloy Material: Aluminum Alloy. Mount Size: 70mm x 37mm x 31mm Rail Type: 20mm Weaver Standard Rail Mounts to: Weaver or Picatinny Rail Suitable for 25mm (1") Tactical Flashlight & Laser Sight Tube Mounting Need