Check the listing for details. Celestron C-14 Bahtinov Focus Mask Special split Cap Fit Bahtinov for Hyperstar. Condition: New. Listed at 34.99 USD. Please read, there may be different types and sizes of this model. For Celestronc14. And is split for Telescope with Hyperstar or without. . I can easily change measurements if need changes to fit yours just let me know sizes in milimeters. Can buy this one and measage me the measurements you need it changed to and thats the one Ill send. Thanks. Bahtinov Focus Mask for Telescope - Celestron C-14. From Spencer 3D SLIDE ON. 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 free USPS SHIPPING. 2 TO 3 DAY SHIPPING. BLACK. If want in a different color I can make in several other colors just message and ask me. New Design c14 w Hyperstar split design, New design.