With this very sturdy aluminum mount, you can quickly and easily attach devices with Weaver Picatinny mounts to your rifle scope with a 25.4mm (1") central tube diameter. It is thus the perfect solution for accessorizing your rifle scope with red dot sights, lights, lasers, etc Weaver Picatinny rail length: 44mm Weaver Picatinny rail width: 21mm Weight: 31g Overall height: 44mm Rifle scope - central tube diameter: 25.4mm (1") 4-fold screw fastening Material: all-aluminium Material - screws: steel