Neewer 4PCS Standard 1.25 inches Color Filter Set for Telescope Eyepiece: Red Yellow Green Blue, Perfect for Lunar and Planetary Observation Eyepiece filter set includes: (1)Red Filter + (1)Yellow Filter + (1)Green Filter + (1)Blue Filter. Note: Filters ONLY. Telescope and Tripod Stand in the pictures NOT INCLUDED. Designed to reduce glare and light scattering, perfect for lunar and planetary observation, allow you see the details Four colors green/red/yellow/blue provide more choices to suit for different planets. Optical glass lens, provides clear and sharp image; Lightweight and solid anodized aluminum frame. Standard 1.25" size,suit for any 1.25" diameter eyepiece. Double-threaded, allow to be stacked in various combinations.