Features 1、The magnification is 20 times, with a wide viewing angle and a wide field of view. 2、Enhances the viewing experience and makes the image clearer and brighter. 3、Adopts high‑quality aluminum alloy, durable and wear‑resistant, can be used for a long time. 4、Exquisite workmanship, can be widely used in metallurgical microscope. 5、Portable, light weight, small size, easy to carry, easy to install. Specification Item Type: Objective Lens Material: Aluminum Alloy Color: As shown in the picture Model: KP-20X Magnification: PL20X Numerical Aperture: 0.4 Working Distance: 8.8mm/0.35in How to Use: Get the product, first look at the lens parameters, install it on the corresponding device, and then perform observation and measurement. Package List 1 x Objective Lens 1 x Installation Diagram