1、COLOR FILTERS: Red filter makes Venus stand out during the day. Orange filter increases the contrast between light and dark areas. Yellow filter makes Mars brighter. The green filter enhances frost spots, surface haze and polar projections on Mars. At maximum separation, the blue filter helps to split the binary star Pegasus. Purple filter penetrates the vapor and ionosphere and reduces the effects of stray light, especially when observing star clusters. 2、COMPATIBLE: They are designed with M48x0.75mm screw threads, compatible with any 2 inch telescope eyepieces. They can be used individually or in combination, providing more utility and flexibility. 3、EASY TO INSTALL AND USE: These filters can be easily screwed into the eyepiece lens, easy to install and simple to use. They can help filter out unwanted light and allow you to see more clearly when observing. 4、STORAGE CASE: The set is equipped with a portable shockproof storage case, which protects the filters from damage and makes it easy for you to carry the filters at any time. 5、PREMIUM MATERIALS: They are made of premium aluminum alloy and acrylic materials to ensure a long service life and provide users with a stable and long lasting observing experience. Item Type: Telescope Eyepiece Filter Set Material: Aluminum Alloy, Acrylic 6 x Filter 6 x Storage Case