Focal length: 500mm 870mm 900mm. Caliber: 114mm. The thickness of the main mirror about 15mm.
eBay
D114F900 Newton Reflection Mirror Primary Mirror with 25mm Secondary Astronomical Concave Mirrors for Telescope DIY
Aliexpress UK
Rear View Mirror for Driving Test, Secondary Instructor Examiner Learner Mirror, Adhesive Interior Suction Cup Car Mirror for Driving Lesson (200 X 62 Mm). Special feature function(f) {var _np=(window.P. ).
eBay
D114F900 Newton Reflection Mirror Primary Mirror with 25mm Secondary Astronomical Concave Mirrors for Telescope DIY
Aliexpress UK
Focal length: 750mm. Caliber: 203mm. Spherical mirror, aluminum plating and protective film. The thickness of the main mirror about 18mm.
eBay
1pc 38mm Short Axis Secondary Mirror for DIY Newtonian Reflecting Astronomical Telescope Oblique Flat Mirror
Aliexpress UK
Spherical primary mirror and secondary Mirror set. Secondary mirror: minor axis 25mm. 1 PC 25mm secondary mirror. Primary Mirror Focal Length: 650mm.
eBay
20/25/28/30/35/40/42/45/50/54/56/60/70 mm DIY Newtonian Reflective Astronomical Telescope Secondary Mirror Elliptical Short Axis
Aliexpress UK
Auxiliary Mirror Size Available: High Precision 32mm, 35mm, 45mm, 50mm, 55mm, 60mm, 65mm. Type: Elliptical Plane Mirror. Coating: Aluminum Reflection + Protective Film. If you have any problems or concerns whatever with your order or products.
eBay
Maxgeek CYCK Telescope Modification Kit Secondary Mirror Spider DIY Kit for SkyWatcher 10-inch 250mm Telescopes（As option shown
Aliexpress UK
Orion Optics 6" Newtonian parabolic mirror and secondary. Both have been fitted once then stored perfectly, unmarked and kept in precise conditions as required.
eBay
Auxiliary Mirror Size Available: 20/25/30/35/40/42/50/54/70. Oblique Mirror Flat Mirror Elliptical Plane Mirror. Type: Elliptical Plane Mirror. Coating: Aluminum Reflection + Protective Film. If item is defective after 3 months, you can still send it back to us.
eBay
Caliber: 160mm. The thickness of the main mirror about 18mm. Spherical mirror, aluminum plating and protective film. Accuracy of the mirror: 1/6 wave. Focal length: 1280mm.
eBay