Bahtinov Focus Mask for 365mm Outer Diameter Fit for 12 Inch Telescope

365mm outer diameter fit Bahtinov. Or 14.37 Inch fit 

CUSTOM BAHTINOV ORGINALLY DESIGNED FOR A CUSTOMER. THIS FITS THE OUTER DIAMETER OF THERE 12 INCH TELESCOPE, WHICH HAS AN OUTER DIAMETER OF 14.37 INCHES

Bahtinov Focus Mask for Telescope - 14.37 inch outer diameter fit.  External  SLIDE ON fit like cap. Condition is New. Shipped with USPS First Class. Software Designed and tested. Works great with these and similar models. 3d printed and designed by Spencer 3d. As always fast USPS SHIPPING. 2 TO 3 DAY SHIPPING. BLACK,  If need in different color let me know or if need one to fit your telescope let me know I may already have a design, if not I can design to fit yours. May fit others same size or other brands.