Solid brass：1/4" MNPT Fittings, MAX working pressure 300psi,Solid brass end fittings never corrode and seal better than aluminum, steel, or zinc HYBRID AIR HOSE: The hybrid hose is an attempt to capture the best of PVC and rubber. Hybrid Hose aims to harness the lightweight and abrasion resistance of PVC, and the flexibility of traditional rubber hose, even in cold weather. 3/8” x 100 FEET HOSE: Wider hoses can limit frictional loss,so our hybrid air hose is 3/8” Inner Diameter, it is two times larger than 1/4” air hose, having a larger space for airflow will accommodate more air volume. EXTREMELY DURABLE: Three layer designed: Inner layer, Outer layer and Reinforced Polyester Middle layer , which is makes this air compressor hose extremely durable. The maximum working pressure 300 PSI, Busting Pressure 900 PSI. Construction Applications: Supplies compressed air to pneumatic tools and inflation accessories. Use on professional jobsites, in automotive shops or at home in the garage. BUILT TO LAST: Protective rubber coating extends life of the hose. Won't kink under pressure, coils easily and lays flat with zero memory Bend Restrictors reduce kinking and help to increase the life of the air hose Hybrid Air Hose, 3/8-Inch by 100 Feet Air compressor Hose,Heavy Duty, Lightweight, Kink Resistant, All-Weather Flexibility, 300 PSI