Metal body, fully multi-coated lens provides a clear view. It can double as any 1.25-inch telescope eyepiece. Ideal for high-power observation. The brass compression ring can protect the eyepiece from damage or scratches on the tube. Keep the eyepiece looking new. The back of the tube also has an external T-thread for connecting DSLR cameras and other T-thread accessories. Features: 1. Multi-coated 2. The edge of the lens is blackened to reduce internal reflections 3. The 1.25-inch barrel can be installed in standard 1.25-inch focusers and diagonals 4. The set screw hits the brass ring inside to fix the 1.25-inch eyepiece inside, eliminating the mark on the eyepiece barrel Model:SV137 Magnification:2x Interface:1.25Inch/M42*0.75 Coating:Full multi-coating Eyepiece protection:Internal brass ring Colour:Silver & Black Material:Metal Package Contents: 1 * Barlow Lens Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.