1Material: Made of pure copper material, the surface is chrome plated, and the achromatic objective lens feels comfortable. 220.2mm Interface Thread: With universal 20.2mm standard RMS interface thread for wide compatibility. 3Product Features: The low magnification objective lens has a larger aperture, brighter image, large field view, and the image search time is short. 4Infinity Lens: The imaging of the infinity lens is clearer and sharper, and the field of view is wider than that of the ordinary achromatic objective lens. 5Clearer and Sharper: The infinity objective lens is a parallel light path with no included angle, correcting the spherical aberration and sink aberration.1 x Microscope Objective Lens1 x Storage Box (installed)1 x Protective Cover (installed)