These metallic hoses are braided to give strength when the hose is pressurized and to provide a solid protective cover during use. Typical materials such as 316L and 321 stainless steel can withstand extreme variations in temperature, from cryogenic up to 1500°F (815°C). Multiple braid layers can increase working pressure as well as with corrugation shape, profile, wall thickness and material type. With differing engineering techniques involved and excellent burst strength-to-wall thickness ratio, these hoses are relatively lightweight compared to equivalent non-metallic hose alternatives in the market.