The Shell Was Made of Full Metal Aluminium Alloy, Anti-Deformation, Anti-Rust, Sturdy &Durable For Long Time Use. 3X Magnification Factor With 1.25” Interface: 3 Times Magnify of Any 1.25'' Eyepiece
It is Easy to Install, Place The Eyepiece of Choice in the Barlow Lens Then Insert the Barlow Lens into the Frame.