SPECIFICATION: 1) Zinc Coated for Rust and Corrosion Proofing 2) Double wall Galvanized Steel Tube 3) Use for Hydraulic Braking Systems, Fuel Systems, and Transmission Systems PACKAGE INCLUDED: 1* 3/16 In.OD 50 FT Roll Brake Line Tubing Steel Tube Nut 3/16 (3/8-24 I) x 10, Fitting 3/16 (7/16-24) x 2, Steel Tube Nut 3/16 (9/16-18 I) x 2, Fitting 3/16 (1/2-20) x 2.