New Design Universal bahtinov mask that fits any 52mm outer diameter lenses or telescope. Actual inner diameter is 52.5mm. Condition is "New". Shipped with USPS First Class. Free shipping through USPS 2 to 3 days when buying inside the United States. Made with black Carbon Fiber plastic on 3d printers. Made and designed by Spencer-3D. If need a size thats not posted on my sells list just message me and I will make the size you need no problem. I can design or make changes on just about anything.  If need a Bahtinov mask or part ti fit your telescope or camera message me. I do more then just Bahtinov masks, I make and sell alot of different things. I always have shipped out WITHIN 48 hours of purchase unless its an custom made part or its in a weekend or holiday.  Usually %90 of items get made and shipped within 24 hours of purchase, so I pride myself on getting your project or products to you as soon as possible . Thanks....Matt