Earl's 420008 Perm-O-Flex Stainless Steel Braid -8AN Rubber Hose - 20 Feet Outer material is made of braided stainless steel that provides a maximum protective cover Maximum pressure rating of 1500psi with a minimum bend radius of 3.5" Inner liner is constructed from synthetic rubber tube that provides a clean, fast and constant flow Continuous use temperature rating is -40 to +300 degrees F. Continuous use temperature rating is -40 degrees to + 300 degrees F