Feature: 1. WIDELY USED: The infinity objective lens feature standard thread, most professional biological microscopes on the market can be used. 2. CLEARER AND WIDER: Infinity objective features parallel optical pathway, with no included angle, correction of spherical or sunken errors, resulting in clearer and sharper images, and a wider field of view. 3. LOW MAGNIFICATION LENS: The low magnification lens of the microscope objective have a larger aperture, brighter imaging and a larger field of view. 4. COATING TREATMENT: This objective lens have been coated and has a high transmittance and refractive index, making the image brighter and clearer than other objectives. 5. COMFORTABLE VIEWING: Infinite objective lens make viewing more comfortable, the lens will not be damaged or blossomed, and the service life is long. Specification: Item Type: Infinity Objective Lens Material: Brass, Stainless Steel Use: The thread interface size is an international standard size, and most professional biological microscopes on the market can be used Specification: 40X. Package List: 1 x Infinity Objective Lens1 x Storage Box