Stainless steel material have 3 levels, Stainless steel 304, Stainless Steel 316, Stainless steel 316L.

For SS304 usually use for meat factory, slaugther chicken, farmer's market, fish farm and etc.

For SS316 usually use for boat navigation, yacht, seaside device and etc.

In a total, SS304 usually use for indoor environment, and needs to wash the device always. And for SS316 it's not only needs to wash the device, but also anti-corrosion, and we'll add conformal coating on motherboard or driver board when client use on marinetime use, and do anti-oxidation on outer case.