For all Pentax refractors using the large 84mm thread (100 SDUF and up).
Directly mounts to the 2" threads on all popular SCTs (Celestron, Meade). Physical length 47mm (wt 164gm)
The T-2 Quick Changer System is is comprised of one each, Quick Changer and Quick Change Ring. Purchase additional Quick Change Rings if you desire to interchange multiple components.