5.5" Rings for 130 Starfire GTX and 130 Starfire EDT/EDF refractors or other telescope tubes of 5.5" diameter (new top-of-ring hole-pattern and taller base for increased clearance); weight: 2.80 lb. (1.3 kg.). Note: New top-of-ring hole-pattern allows direct connection of dovetail plates (no riser block needed).
A Pair Of Rings With Driving Electric Motors With Micrometric Movement Of The Pistons. The Kit Includes: Italy 2 Rings Inside Diameter 130 mm, Photo 2 Electric Motors 9V, Photo 2 Remotes Adjustment 2 Mechanical Push 2 Mechanical Piston.