Suit new buyer. As new Zen DP100-EP-100mm(4") optical Glass Dome Port for Panasonic 8mm fisheye lens and Olympus PT-EP01, PT-EP02 & PT-EP03 housings (no modification required) and PT-EPO5, PT-EPO6 & PT-EPO10 ( with slight modification to housing). Near new condition, no scratches or marks. Used only twice (once in a swimming pool). Get a glass port for the price of an acrylic port. Will not be disappointed by condition. Purchased from new in December 2013.Comes in original box with instructions, spare 'O'ring and unopened 'O' ring grease.Price US$500.00 plus postage. Can supply additional photos.