"Pair Of Anodized Aluminum Rings For Telescopes Diam. 4" "(10Cm) With Space For Accessories Like Starbeam, Piggy Cam ... To Search Options To Adjust The Distance Of The Rings To Each Other And To Add Other Accessories Thanks The Top Slide. "
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).