University Optics orthoscopic eyepieces: 6mm, and 4mm. Both eyepieces are like new with caps and boxes. Both are new style (multi-coated letters in green) circle-T japan. I will sell them only as a set for $100.00 shipped USPS priority mail with insurance in CONUS. Payment via PayPal (no credit cards) is preferred, but if you don't mind waiting you can send a money order.