Astrozap Bahtinov Mask - 216-292mm

Astrozap Focusing Screen For 8.5-Inches to 11.5-Inches (216 to  292 mm) Telescopes/center:  

This focusing screen is a lightweight aluminum focusing screen with adjustable grommets. It fits telescopes with Outside Diameters of 8.5 to 11.5-inches (216 to 292 mm). The thin design allows for optimal performance. 

Manufacturer Product Number: 503