RUSTPROOF POLYETHYLENE GAS TANKSHigh-density 1-pc. polyethylene tank has no seams or weld to leak or split!No interior rust scale buildup to clog fuel system!Walls are almost 1/4" thick to reduce condesation, resist punctures and prevent cracking even at -130° FLighter in weight, easier to install than steel tank...no sharp edges to cut hands. Replaces original without modifications. Installs using existing sending unit. Includes, new lock ring, gasket or "O" ring as required. Limited 5-year warranty.