AZ Patio Heaters Empty Propane Tank Manufactured by Manchester Tank in the most up-to-date, state-of-the-art cylinder facilities in the USA Cylinder conforms with strict compliance to DOT specifications 4BA240. Cylinders have powder coat paint for maximum rust protection HANDLE-EZ collar design. The only collar with a built-in, formed handle with no sharp edges All cylinders include consumer warning decals that are easy to read for your protection Cylinders are shrink wrapped on pallets or boxed individually for protection and easy storage