STANDARD COMPLIANT: Our semi truck air hose kit meet or exceed DOT FMVSS 106; SAE J1402 - Type A; 3/8" Air Brake Hoses, 49 CFR 571.106. Replace for Tectran 13S15401, for Tremec Sloan 455180DSET, for Philips 11-8115, etc PREMIUM QUALITY: The semi-truck air line kit's double-braided design consists of interwoven spirals and is manufactured using a 3-layer integrated molding process. The air line hose assembly has higher burst pressure and better resistance to twisting, with a longer service life RED&BLUE COLOR-CODE: The CheeMuii air brake hoses kit are overall red and blue color coded for easy identification of service and emergency configuration (polarized) or general purpose (non-polarized) SWIVEL BRASS DOT FITTIING: The CheeMuii free 360° swivel DOT air hose fittings are made of high-quality CA360 brass, meets D.O.T. FMVSS 571.106 approved, SAE J1131 air brake system requirements, with corrosion resistance, high-temperature ductility, low permeability and long service life. And 1/2" NPT threads are pre-applied with sealant to prevent leaks SPRING JOINT & RUBBER HANDLE: The joints at both ends of the air hose line are protected by spring joints and rubber grips to provide protection and prevent kinking in situations such as sharp turns 15 FT Semi Truck Air Line Hose Assembly Red & Blue Color-Coded Rubber Air Brake Hoses With Flexible Grips & DOT Fittings for Truck Trailer Tractor.