DuRyte Pro 300 PSI Hybrid Lead-In Air Hose - 3/8-Inch 6-Feet, 1/4" MNPT Ball Swivel x 1/4" FNPT Brass Ends Very good flexibility at temperatures that range from -30 to 165 degrees F is for all weather use Coils and stores easily for reuse Contractor grade; Tough, spiral synthetic yarn reinforcement offers excellent strength of maximum working pressure 300 PSI Solid brass end fittings never corrode and seal better than aluminum, steel, or zinc