Fire Hose Coupling Lug Style Storz Fire Hose Type Double Jacket Fitting Material Aluminum x Aluminum Fitting Type M Storz x F Storz Hose Color Yellow Hose Fitting A Material Aluminum Hose Fitting A Type M Storz Hose Fitting B Material Aluminum Hose Fitting B Type F Storz Hose Inside Diameter 4 in Hose Length 100 ft Hose Tube Material Polyurethane Jacket Material Polyester Maximum Working Pressure at 70F 300 psi Standards NFPA 1961 NFPA 1963 Burst Pressure 900 psi