Flexible Metal Hose Assembly, Hose Inside Dia. 1 1/2 in, Hose Length 4 ft, Hose Tube Material 321 Stainless Steel, Hose Cover Material 304 Stainless Steel, Max. Working Pressure @ 70 F 472 psi, Temp. Range 1500 Degrees F, Standards ASME B31.1 & B31.3, ASME BPV SEC. IX, ASTM A240, ASTM A580, COMPLIES TO PED 97/23/EC CATEGORIES I/II/III/V, ISO 10380 TYPE 2 COMPLIANT, Dynamic Min. Bend Radius (In.) 12 in, Hose Fitting A Material Carbon Steel, Hose Fitting B Material Carbon Steel