Magnifying Head, Power 4x, Diopters 16D, Focal Distance 2.5 In, Lens Dia 30 mm, Lens Aspheric w/Hard Coating, Plastic Case, Features German Optics, Wide Field, For Use With 3DUX3, 3DUX4, 3DUX5, or 3DUX6 Handles MagnifiersIlluminated Handles and HeadsOrder illuminated handles and prefocused lenses separately. Aspheric lenses with hard coating.