Smooth elastomer inner tube resistant to deterioration from CO2 and flexible between -65° F and 125° F. Stainless steel reinforcing braid. Pin-pricked outer cover resistant to deterioration from elements and abrasion. Corrosion resistant brass end fitting with aluminum crimp collar. All assemblies carry a 5 to 1 safety factor. All assemblies pressure tested to 675 psig. Hose is clearly marked with blue stripe with Flexible Components Polar/CO2 Liquid/Vapor 450 psi. 1 in I.D. Polar Hose, Brass, 1-1/2" x 2" CGA.