What is the Piston made from?

The brass Piston is made from high quality HTB1 high tensile brass. This makes it resistant to corrosion, and means over time a beautiful patina will form on the surface. Of course, you can always polish it back up to a shine if that's what you prefer! 

The stainless steel Piston is made from 316 grade stainless steel. It is resistant to corrosion, and will maintain its shiny finish. You can remove fingerprints or oils with a dry cloth.