Fangrui Product Details Purpose: They Are Additional Accessories That Increase The Working Distance Of The Microscope Or Increase The Magnification Of The Microscope. Suitable For Video Microscopy. Purpose: Enhance Microscopic Viewing With Multiple Magnification Options Compatibility: Ideal For Stereo Microscopes With 48mm Thread Mounting Thread: 1-7/8inch (47mm/48mm) Magnification Power: 0.5x, 0.7x Working Distance: 165mm, 120mm Note: Installation Guide Not Included, We Strongly Recommend You Seek Professional Installation. Please Check As Much As Possible To Make Sure The Item Is What You Need. Tips: The Product May Be Updated Constantly ,due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:photo Color Material:plastic Package Contents: 1 X 0.5x Microscope (screw Opening Diameter 48mm) 1 X 0.7x Microscope (screw Opening Diameter 47mm) Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May C