YUEOCT Guiding Scope Rings with Finder Dovetail Mounting Plate for Telescope Guidescope Finderscope Guide Scope Tube - 38 to 72mm / 1.49" to 2.83" Diameter Adjustable - AT-16

• 【38 to 72mm Diameter Adjustable】 Guide rings ideal for mounting a guide scope with a diameter of 38 to 72mm (1.5" to 2.83") parallel to the main telescope. Knurled thumbscrews with nylon tips are easy to secure the guide scope. 【Rings with Three M6 Threaded Holes】 The bottom plane of each ring provides three M6 threaded holes for easier connection to your existing equipment. One central M6 threaded hole, two M6 threaded holes with a spacing of 20mm (0.79"). 【Synta-style Dovetail Bar】 Dovetail mounting bar fits into Synta-style dovetail finder base found on many telescopes. 【Bar with Multifunction Holes】 Two M6 countersunk holes with a spacing of 70mm (2.76"). One 1/4"-20 threaded hole in the middle, two M6 threaded holes with a spacing of 20mm (0.79"), two M8 threaded holes with a spacing of 35mm (1.38"). 【Bar with Locating Groove】 The dovetail bar has two built-in locating grooves for precisely aligning the guide rings.