WE DO NOT RENT TAP SYSTEMS OR COMPONENTS. THESE ITEMS ARE NON-RETURNABLE. Package of two. Soft neoprene provides an excellent seal between beer nut and shank/coupler. Photo shows typical arrangement. Nut and tailpiece not included.
Outside Diameter = 20.3 mm/ 0.8 inch.
Inside Diameter = 12.5 mm/ 0.5 inch.
Thickness = 3.3 mm/ 0.13 inch,