4000 PSI Black 3/8" x 50 FT 1 Layers of High Tensile Wire Braided Rubber Wrapped Pressure Washer Hose with Couplers Rubber construction throughout, with a single layer of steel-wire braid. Designed for flow ratings of 2.5 to 5 GPM commercial cleaning applications Inner Tube: Synthetic rubber Reinforcement: One layer of high tensile braided steel Working Pressure: 4000 PSI - 276 Bar Proof Pressure: 8000 PSI - 552 Bar Burst Pressure: 16000 PSI - Hose Connection: 3/8" Quick Connect Female Brass Socket & 3/8" Steel Plug