Two 100mm, 125mm or 150mm guidescope/finderscope rings on a single 7" Dovetail Plate Adapter.  Fits 4" Losmandy style dovetail bars.  3/8" aluminum adjusting screws with large 1/4" Delrin Tips.  Stainless steel and anodized aluminum throughout for maximum durability.  Will handle scopes with diameters 4.5" and below.  6" Separation between rings.