Feature 1LED MICROSCOPE LIGHTS: These microscope lights are made up of multiple LED beads that are brightly focused, providing uniform illumination with no shadows of the object being observed. 2SWITCH, BRIGHTNESS ADJUSTABLE: The microscope light source has a switch and adjustable brightness, the brightness can be adjusted from 0100 percent 3WIDELY APPLICABLE: The microscope LED light source is suitable for small lathes, cameras, binocular lenses, professional microscopes, and for all kinds of stereo microscopes. 4PORTABLE SIZE: Microscope accessory light kit, inner diameter of about 63mm, outer diameter of about 97mm, compact and lightweight, easy to carry and use. 5PLUG AND PLAY: The adjustable microscope LED light is simple to operate, plug and play, stable performance, safe and reliable, and durable.Item Type: Microscope LED Light SourceMaterial: ABSSize:Inner Diameter: Approx. 63mm/2.48inOuter Diameter: Approx. 97mm/3.82in .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x MicroscopeLEDLightSourceNoteManual measurement please allow some error.