12 ft. Blue (Service) Coil with 6 in. Lead Assembly Includes One Blue Hose Assembly. Coiled Air Brake Hose Assemblies include permanently swaged 1/2 inch -14 NPTF end fittings with heavy gauge spring for extra support. Each coiled nylon air brake hosekit contains one Emergency (Red) and one service (Blue) 1/2 inch O.D. nylon tubing assembly. Assemblies meet SAE J844 and FMVSS 106 requirements.