The viewing field of wide-angle eyepiece is more than 50% larger than that of normal eyepiece. A very practical microscope eyepiece, effectively enlarged of view. Image bright and clear, the effect is clearer. The eye is not easy to be tired when observing, protect your eyesight. Easy to attach on objective, just screw it on. Magnification: WF10X colour:black Material:Aluminum alloy + glass size:View: 16mm Reticle Scale: 0.1mm Interface diameter / mounting size: 23.2mm/0.9inch Package Contents: 1* Microscope Eyepiece Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.