1,23.2mm Universal Standard Interface: The international standard biological microscope interface size is 0.91 inches, which is 23.2mm in millimeters, and 95 percent of biological microscopes on the market can be universal. 2,Tips: In order to facilitate observation, it is recommended to start from low power observation to obtain a good field of view and brightness, according to the needs of the observed object, gradually watch at high power. 3,2X Mirror: HD high grade optical lens, biological microscope universal 2 times expansion mirror, imaging clear without deformation. 4,All Metal Tube: The surface and inner wall are smooth and fine, the body and inner wall are aluminum alloy material, durable, anti scratch. 5,Reasonable Design: Light weight, easy to carry, flexible to use, you can use according to your own needs, to provide you with convenience. Item Type: 2X Multiplier Eyepiece Lens Weight: 26g/0.9oz Material: Aluminum alloy and optical glass Multiplier: 2X 1 x Microscope Eyepiece Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.