Industrial Duct Hose, Hose Inside Dia. 4 in, Hose Length 50 ft, Hose Tube Material Polyethylene, Hose Reinforcement Type Helix, Hose Reinforcement Material Polypropylene, Hose Color Black, Vacuum Rating Not Rated, Max. Working Pressure @ 70 F 3 psi, Temp. Range -40 Degrees to 225 Degrees F, Standards FMVSS 302, Bend Radius 4.5 in