The Bakes Gall Duct Dilator Fig. 1 (32 cm / 12 ½ inch length, 1 mm diameter) is the smallest and finest single instrument configuration within the Bakes biliary family. It is specifically engineered to safely clear, map, and incrementally widen the most constricted or delicate pathways of the common bile duct without causing micro-tears or accidental wall perforations.