1.25 inch Moon Filter Astronomical Telescope Eyepiece Optical Lens ND Medium Gray Density Filter Set of 6pcs with Box

Specifications:
Interface specification: 1.25 inches (for astronomical telescope 1.25 inches eyepiece, about 31.7mm)
Thread specification: M28.6x0.6mm
Transmittance: 52% transmittance ND2, 25% transmittance ND4, 12.5% transmittance ND8, 6.25% transmittance ND16, 3.12% transmittance ND32, 1.56% transmittance ND64
Lens material: acrylic
Frame Material: Metal-Aluminum
Colour: Black

Package Included:
1x Set of Filters
1x Optional Box (Plastic or Aluminum)