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 Lens Material: Aluminum Alloy + Optical Glass Model: WD30 Purpose: Special Objective Lens for Microscope Lens Diameter: Approx. 37mm / 1.5in Applicable Interface: M48 Thread Outer Diameter: Approx. 45mm / 1.8in Height: Approx. 22mm / 0.9in Working Distance: Approx. 30mm / 1.2in Magnification: 2X. Package List: 1 x Objective Lens Note: 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.