You can get a gander and detailed specs (more detailed than you usually get at retail Internet vendors on any eyepiece) here, to make the link work you have to cut and paste it into your URL bar and change the -dot- to periods (Astromart does not permit live links):
If that doesn't work try a google search on "edmund industrial optics" and when you get to their site do a search on erfle. Click on the resulting thumbnail and you will learn a lot about this eyepiece, including its new price of $225.
I'm selling an optically clean eyepiece, a few barrel marks, can't really call them scratches. My price: $110 includes CONUSA shipping. This is less than 50% new value and is meant to move the product.
thanks for looking,