Feature 1WIDELY USED: The infinity objective lens feature standard RMS thread, most professional biological microscopes on the market can be used. 2CLEARER 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. 3LOW MAGNIFICATION LENS: The low magnification lens of the microscope objective have a larger aperture, brighter imaging and a larger field of view. 4COATING TREATMENT: This objective lens have been coated and has a high transmittance and refractive index, making the image brighter and clearer than other objectives. 5COMFORTABLE VIEWING: Infinite objective lens make viewing more comfortable, the lens will not be damaged or blossomed, and the service life is long.Item Type: Infinity Objective LensMaterial: Brass, Stainless SteelUse: The thread interface size is an international standard RMS size, and most professional biological microscopes on the market can be usedSpecification: 40X .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Infinity Objective Lens1 x Storage Box