The Grainger Approved Metal Hose is a flexible metal hose that connects air, water, oil, or exhaust systems. It has a 304 stainless steel corrugated inner hose covered by a stainless steel braid reinforcement. The hose has a temperature range of -20°F to 850°F, resists corrosion, abrasion and crushing, and conforms to tight bending radii. It is available in sizes ranging from 1/4 in. to 4 in. inner diameter, with lengths up to 25 ft. The hose fittings have male NPT or socket weld ends.