Gosky 2 Inch Polarizing Filter No3 for Telescopes & Eyepiece Provide enhanced contrast on the Moon and the planets, also helps to reduce glare Retain true color balance since all wavelengths are transmitted uniformly over the entire spectrum Comes with sturdy plastic case-proect the eyepiece from dust and moisture The filter will fit all standard sized 2" eyepieces and accessories. Can be threaded on both sides for stacking with other filters if necessary Mounted in a nicely anodized housing