Bahtinov Focus Mask for Telescope - Explore Scientific ed102 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 . Other colors and types available just ask. Will receive orange or black unless you need a particular color then please let me know by message. Thanks. New version two ed102