Check the listing for details. Optical Comparator Chart For Profile Projector Overlay Chart 512600 NO.20. Condition: New. Listed at 59.01 USD. Optical Comparator Chart For Profile Projector Overlay Chart 512600 NO.20 Optical Comparator Chart For Profile Projector Optical Comparator Chart Overlay Mylar Profile Projector Designed for use with profile projectors whose screen diameter is 600mm or larger. package:1 Optical Comparator Chart. Notes:We will check the products carefully before shipping. After receiving the item, if you have any questions, please write to me, please do not leave negative feedback and low scores, and do not open CASE, I will try my best to help you solve the problem, as a seller, we will be responsible for everything. Contact us:If you need any type of item, please contact us via eBay messaging service. We will respond to you very promptly. At our store, we make every effort to ensure that every buyer's experience is as valuable and enjoyable as possible. You can buy with confidence knowing you're getting a worry-free deal!