Compatible for Celestron telescope users, these eyepiece guards provide both protection and improved viewing quality. The adjustable polarizing filter for astronomy helps reduce unwanted light and glare, allowing for clearer and more detailed observations. Simply fit the guards onto your telescope eyepiece, and adjust the filter to your desired setting for optimal results. Features -Color:Black -Material:Rubber -Size:4.00X4.00X1.60cm/1.57X1.57X0.63in -Robust construction: made from durable rubber, these eyepiece guards are built to withstand regular use while providing maximum comfort -Light shielding: these guards effectively shield your eyes from intense light, reducing eye strain and enhancing your viewing experience -Impact resistant: designed to resist impacts, these eyepiece guards offer additional protection for your eyes during telescope sessions -Adjustable fit: specifically engineered for telescopes, these guards ensure a practical fit and seamless compatibility with your equipment -Quick installation: easy to install, these eyepiece guards allow for a quick setup, letting you get back to your stargazing activities without delay Package list: 2pcs x eyepiece eyecups