Your O.D. Measurement: 4 3/8 (111mm) to 4 5/8 (117mm) | Telescopes that fit this Filter size: Meade 4” APO, 102ED; Orion: ED 80/100 refractors, StarMax/Apex 102, AstroView 100, SkyView Pro 100, C80 SLT; Vixen ED103SWT; Takahashi TSA 102; Williams Optics: Megrez 90 | View the sun with your own eyes. See sun spots, solar eclipses, Eclipse viewing | Total Solar Eclipse April 8, 2024 in the USA. | I have been building and developing safe solar filters for over 15 years.