CNC machined rings (x2) set to fit the Celestron 180mm Maksutov Cassegrain tube

Drilled and tapped to M6 to accept either our Losmandy type plates and top plates or other items which need to be secured with a screw.

Large M8 threaded Anodised blue knobs to secure the ring tight on the tube, This can be slackened off slightly so the tube can be rotated in side the ring, Black felt is stuck to the inside surface of the ring to stop marking and help protect your tube.