Great Material: The mirror body is made of excellent steel material, and the shell is chrome plated treatment, with fine workmanship, and drop resistant. The microscope objective lens has high power 100X magnification, the numerical value is accurate, and the operation. Wide Field of Vision: More comfortable viewing, the lens will not injure, bloom, and have a long service life. If you have any problems or questions about the lens, our customer service knows this product well and is ready to assist you. Uses: Suitable for using eyepieces on microscopes. Biological Microscope Lens with spring protection device, the cover glass can be automatically rebounded when it is observed to avoid crushing the specimen,it can work durable for several years. Great Workmanship: The entire set is well designed and good workmanship. The objective lens has coating treatment, with high light transmittance and refractive index, and the image is brighter and clearer than others. Pleasant experience: You can use it safely in all occasions, and at the same time you can buy it for your children to improve their innovative awareness and ability, so that children can win at the starting line and become more competitive in society. How to Use: 1. Can be used after connecting with the microscope. 2. In order to facilitate observation, it is recommended to start observation at low magnification. It is more difficult to adjust at high magnification than at low magnification. According to the characteristics of the observed specimen, not all slices are suitable for observation under high magnification. Specification: Item Type: Objective Lens Model: 1.25 divided by 100 Material: Brass Use: Microscope accessories Interface Size: Approx. 20.2mm, 0.8in (international standard RMS size) Magnification: 100X Numerical Aperture: 1.25mm Cover Glass Applicable Thickness: 0.17mm Microscope Applicable Mechanical Tube Length: Approx. 160mm, 6.3in Working Distance: 0.13mm Impregnation Medium: Cedar Oil Spring: Yes (automatic rebound) Common Rail Distance: Approx. 195mm, 7.7in Parfocal Distance: Approx. 45mm, 1.8in