Draft Warehouse 1-3/4 Inch Long Beer Nipple Shank, Stainless Steel (SS304) with Stainless Steel Flange, 3/6-Inch Bore Shank body made of 304 grade Stainless Steel. High grade SS is good for use with Beer or Wine. Shank length is 1-3/4". Nipple is additional 1/2". Install on box towers or any other flat surface. Internal diameter is 3/16".