Breathing Hose, Flexible, Length 300 ft., Inside Dia. 1/4 In., Outside Dia. 5/8 In., Material of Construction Yarn Reinforced PVC, Max. Pressure (PSI) 250 PSI at 70 Deg F, Temp. Range -15 to 150 Deg F, Hardness -, Color Black, Wall Thickness 1/8 In., Features Non Toxic, Low Temp, Low Odor and Heavy