Note: I am only reviewing the can, I am not using the regulator, fittings, hoses or sprayer.The can is a solid, heavy, well built monster. It is ferrous, will attract a magnet. I've owned this over a year and it hasn't corroded. It's been outside in the rain, frozen, thawed, etc and no corrosion anywhere. It looks like it did the day I bought it. I have to assume some sort of stainless variant with high steel content? Unsure. It is not aluminum tho.I use this as a vacuum and pressure chamber. It is also used to extract oils. It holds vacuum for days, literally. I've left it under hard vacuum for over a week with no slow leaks. It holds pressure well, I've taken it up to it's max operating pressure during testing. No leaks.I have zero complaints, zero issues with this tool. I only wish every purchase worked out this well. I will update this later with anything that comes up. Since it's been over a year with constant use on it, I doubt anything game changing will come up.
Gary F. 
