These eyepiece guards are practical compatible for Celestron telescope enthusiasts who want to protect their equipment and enhance their viewing experience. The adjustable moonlight filter for telescopes helps control the brightness of the moon, making it easier to see fine details. Attach the guards to your eyepiece, and adjust the filter to achieve the practical balance of light and clarity. Features -Color:Black -Material:Rubber -Size:4.00X4.00X1.60cm/1.57X1.57X0.63in -Durable rubber material: crafted from sturdy rubber, these eyepiece guards are designed for durability and longterm comfort -Effective glare protection: these guards effectively block out harsh light, protecting your eyes and improving the quality of your observations -Impact protection: featuring that resists impacts, these eyepiece guards provide additional safety for your eyes during use -Compatible: designed to fit telescopes, these guards ensure a practical match and optimal performance with your telescope -Easy to install: with a simple installation process, these eyepiece guards can be quickly attached to your telescope, making setup a breeze Package list: 2pcs x eyepiece eyecups