Made With Military Grade Cross-Linked Polymer. Does Not Rust Or Corrode. Reduces Condensation. Titans Polymer Is 1/3 The Weight Of Steel. Manufactured With No Welds Or Seams. Titan Mid-Ship Tanks Nearly Double The Capacity Of A Stock Tank. 415 Times Less Heat And Cold Conductive Than Aluminum Tanks. Tougher Than Metal. Extremely Tough And Rugged. Easy Installation. 5 Year Limited Warranty. Made In The U.S.A..