1. Premium Material: Made of premium acrylic, the telescope focusing mask is sturdy and , reliable, and has a long service life.
2. Suitable: The telescope fishbone plate is suitable different telescopes, such as reflector, refractor, for Dobsonians, for Mak Cas, for SCT, you just need to measure the size of telescope tubes.
3. 3 Screw Sleeve: The 3 screw sleeve with anti skid silicone cover are used to fix the telescope, prevent slippage while keeping the tubes perfectly centered.
4. Convenient: The focusing fishbone plate overcomes the visual condition, can fast and easily provide perfect focus for your telescopes.
5. Lightweight: The acrylic telescope focusing mask is light in weight, will not damage the balance of telescope, and ensure it will be centered when installing.

Specification:
Item Type: Telescope Focusing Mask
Material: Acrylic
Weight: Approx. 28g/0.99oz
Color: As Shown
Thickness: Approx. 2mm/0.08in
Support Telescope Tubes with an Outer Diameter: Approx. 80-110mm/3.15-4.33in
(Manual Measurement, 1-2mm Error May Exist)

Package List:
1 x Telescope Focusing Mask
3 x Installation Accessories