140mm ID Orion Telescope Tube Rings

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Set of two cast-aluminum telescope tube rings with quick-release, hinged clamp knobs and felt lining
Use to attach 6" telescope optical tube assemblies to a mount or doevtail mounting plate (sold separately)
Sold in sets of two rings
One tube ring has 1/4"-20 piggyback camera adapter; the other has threaded 1/4"-20 socket
Mounting bolts and washers are included