Material:The telescope tube rings are made of metal material,which is reliable in quality,sturdy,and has long service time Telescope Accessories:The telescope tube rings are suitable for professionals and astronomy enthusiasts,fixed main mirror and equatorial instrument,telescope accessories Easy To Install:The telescope tube mounting rings are easy to install and do not require complex steps to complete the installation High Performance:Professional manufacturing telescope tube rings,which are compact and portable,is suitable for 80DX Package Includes:You will receive 1 Pair Telescope Tube Mounting Rings