These eyepiece parfocal rings are a must-have for any serious astronomer. They are easy to install and use, providing a practical solution to the common problem of refocusing. Whether you're observing planets, stars, or deep-sky objects, these rings will help you maintain a sharp and clear view, enhancing your overall astronomical experience. Their robust metal construction ensures they can withstand regular use. Features -Color:Assorted Color -Material:Aluminium alloy -Size:6.00X6.00X0.50cm/2.36X2.36X0.20in -Great image quality: the telescope eyepiece parfocal rings deliver image quality, allowing you to see objects in stunning detail -Precision focus: the parfocal ring design allows for precision focus adjustments, ensuring that you always get the clearest possible image -Adaptable accessory: these rings are adaptable to various observational scenarios, making them an essential tool for any astronomer -Sturdy construction: made from great materials, these rings are designed to withstand regular use without compromising performance -Broad compatibility: these rings are compatible with a wide range of telescopes, making them ideal for amateur use Package list: 2 x parfocal ring 1 x wrench