This Kegco 1/4 inch jockey box fittings set is a set of two grommets, two ferrules, and two hex nuts that allows you to connect an ice box coupler and a jockey box shank to a 1/4 inch O. D. Stainless steel jockey box coil. This set is also great to keep on hand for whenever a fitting needs replacing. The grommets have a 1/4 inch I. D. And a 11/16 inch O. D. And are 3/8 inch tall. The ferrules have a 1/4 inch I. D. And a 3/4 inch O. D. And are 1/2 inch tall. The hex nuts have 7/8"-14 (5/8" BSP) U. S. Beer industry standard thread.