Welcome to our store! Clearer Image: This lens is coated with high light transmittance, high refractive index, and a brighter image. Automatic Springback: Spring protection device, automatically bounces back when it touches the cover glass during observation, protecting the lens from crushing the specimen. Brass Material: Adopts high-quality material, fine workmanship, corrosion and drop protection, exquisite and durable, chrome-plated for the shell. Application: The interface size is the international standard size RMS, can be used by most professional biological microscopes on the market. Basic Specifications: This lens has 60X magnification, a common track distance of 195mm, and a parfocal distance of 45mm. Item Type: Achromatic Objective Model: 60/0.85 Material: Brass Use: Microscope Accessories Interface Size: Approx. 20.2mm / 0.80in (International Standard Size RMS) Magnification: 60X Numerical Aperture: Approx. 0.85mm / 0.03in Cover Glass Applicable Thickness: Approx. 0.17mm / 0.007in Microscope Applicable Mechanical Tube Length: Approx. 160mm / 6.30in Working Distance: Approx. 0.53mm / 0.02in Common Track Distance: Approx. 195mm / 7.68in Parfocal Distance: Approx. 45mm / 1.77in Spring: Yes (automatic springback) 1 x Achromatic Objective 1 x Storage Box If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We will do our best to provide you with satisfactory customer service.