Feature:1. MAGNIFICATION: Not only does it have a 3x magnification, but it also allows for clearer images, up to 3x the sharpness of the image. This allows the user to have a clearer and more accurate observing experience.2. MULTI LAYER COATING: Barlow lenses feature FMC multi layer broadband coating (green film), which eliminates chromatic aberration to a greater extent, resulting in clearer and brighter images, while improving color reproduction.3. DUSTPROOF DESIGN: Equipped with a dust proof cap to better protect it from scratches and damage, the Barlow lenses is also equipped with a screw, which can securely fix the eyepiece.4. INTERFACE DESIGN: The front interface of the lens has an outer diameter of 1.25 inches with internal threads for connecting astronomical telescope filters. The rear interface ID is also 1.25 inches, can be connected to the telescope eyepiece.5. PREMIUM MATERIALS: The barrels are made of lightweight plastic, while the interior is matte finished to minimize reflections and provide clearer viewing.Specification:Item Type: Telescope Barlow LensMaterial: Plastic, Optical GlassWeight: Approx. 32g / 1.1ozMagnification: 3X.Package List:1 xTelescope Barlow Lens