Check the listing for details. Meade Bahtinov Focus Mask ETX-70. Condition: New. Listed at 11.49 USD. Bahtinov Focus Mask for Telescope -Meade ETX70. Inner Diameter of scope fit on end like cap. Outer diameter of mask is 90mm. 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. Dark grey color, available also in black or any other color just let me know. 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. SHIPPING CHARGES ARE CHANGING, DUE TO PRICES OR SHIPPING MATRIALS GOING UP, AND PRICES OF SHIPPING RATES GOING UP MANY OF MY ITEMS THAT WAS FREE SHIPPING WILL SLOWLY BE CONVERTED OVER TO SHIPPING THAT IS CHARGED TO THE BUYER. BUT THIS ALSO MEANS PRICES OF THE ITEMS WILL GO DOWN A LITTLE SO CUSTOMERS STILL GET GREAT DEALS. THIS WILL ALSO MEAN BETTER SHIPPING OPTIONS AND FASTER SHIPPING. AND MORE INTERNATIONAL SHIPPING OPTIONS.