Feature:1. [OPTICAL GLASS MATERIAL] This wide-angle objective lens uses optical glass with high light transmittance, a high refractive index, and brighter, clearer image reproduction. 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 the M48 interface and can be used when installed on a microscope with an M48 interface. 4. [METAL OBJECTIVE LENS BODY] It is made of high-quality aluminum alloy material, which is strong, wear-resistant, corrosion-resistant, finely crafted, and long-lasting. 5. [WIDE FIELD OF VIEW] The microscope objective lens has a wide field of view, making it more convenient to view. The lens will not corrode or become blurred, making it 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 the 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.