17 Piece Set 3/16 Tube Zinc Tube - Zinc Plated Tube Nut Fittings - (10) 3/8-24 TN01, (2) 7/16-24 TN06, (2) 1/2-20 TN04, (2) 9/16-18 TN07, 25 of Zinc Plated Tube. All the size fittings to plumb any car or in 3/16 tubing. This is one roll of 3/16 brake line. is manufactured by Inline Tube. Used for all automotive applications, .028" wall thickness so that is easy to flare, bend and install.