Feature:1. Material: The filter is made of high definition acrylic with good light transmittance.2. Sealing Ring: The aluminum alloy frame sealing ring has better sealing performance to avoid fall or loosen.3. Shooting Effect: It can reduce brightness and reduce glare, but it will not change the natural color of the moon and increase the clarity of the moon.4. You can use the telescope to see more details and surface features of the moon, making the shooting effect better.5. Wide Compatibility: It is suitable for various 1.25inch aperture astronomical telescopes.Specification:Item Type: Telescope Moon FilterMaterial: Aluminum Alloy + AcrylicProduct Color: As Pictures ShownThread Size: M28.6x0.6mmInterface Size: 1.25 inch ( used on the 1.25 inch eyepiece of the astronomical telescope )Weight: Approx. 12g / 0.4oz.Package List:1 x ND Filter1 x Storage Box