Description: Spigot Closure PP/TPE fits all 1-1/8 in. spigot bosses 1-1/8 inch Diameter (Metric) Inner Tubing: 16 mm. For Use With (Equipment): Nalgene carboys, Clearboys, Lowboys and tanks w/thread size of 1-1/8in., 12 male screwhead Material: Polypropylene.