Shop Nilight 12 FT Air Line Hose Assembly Rubber Air Hose with 1/2″ NPT Swivel Fitting Straight Heavy Duty Power Hoses Set Spring Guard Grips DOT Fittings for Semi Truck Trailer Tractor in high quality, support 2 Years Warranty. Our Air Line Hose is equipped with thermoelastic material grips, weather resistant and recyclable, Color coded red & blue grips for ease of emergency and service line identification