This pair of WF 10x eye pieces has been properly cleaned and inspected. When tested with a Titan Monocular Microscope, and a Meiji Microscope (w/ ring light guide), it displayed the test sample very clearly. There is some wear on the facing lens, but nothing that would affect the clarity when looking through them. The facing lens of the eyepiece measures at 17.43mm, and the inner diameter of the hole at the end is 22.46mm. The top portion is 33.00mm in diameter and ~30.25mm long, and the inserting half of the eyepiece has a diameter of 30.00mm, with a length of ~20.00mm. The total length is ~50.20mm long.