Feature:1. [OPTICAL GLASS MATERIAL] This wide angle objective lens uses optical glass, with high light transmittance, high refractive index, and brighter and clearer imaging.2. [2X MAGNIFICATION] The microscope's wide angle objective lens, with a magnification of 2X, helps to clearly observe the internal structure of small objects.3. [STANDARD INTERFACE] The outer diameter of the thread is 45mm, which is suitable for M48 interface, and can be used when installed on a microscope with M48 interface.4. [METAL OBJECTIVE LENS BODY] It is made of high quality aluminum alloy material, which is strong, wear resistant, corrosion resistant, fine workmanship, and long term use.5. [WIDE FIELD OF VIEW] The microscope objective lens has a wide field of view, more comfortable to watch. The lens will not be corroded or blurred, which is a practical microscope accessory.Specification:Item Type: Objective LensMaterial: Aluminum Alloy + Optical GlassModel: WD30Purpose: Special Objective Lens for MicroscopeLens Diameter: Approx. 37mm / 1.5inApplicable Interface: M48Thread Outer Diameter: Approx. 45mm / 1.8inHeight: Approx. 22mm / 0.9inWorking Distance: Approx. 30mm / 1.2inMagnification: 2X.Package List:1 x Objective LensNote:1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. Keep away from direct sunlight.