SS - Satin stainless steel offers a matt finish to stainless steel.
Stainless steel does not stain, corrode or rust as easily as ordinary steel (it "stains less"), but it is not stain-proof.
There are different grades and surface finishes of stainless steel to suit the environment to which the material will be subjected in its lifetime. Grade 316 stainless steel is highly resistant to corrosion and is ideal to use in harsher environments such as wet and humid climates and marine conditions. Grade 304 doesnt provide as much corrosion resistance as grade 316.
Stainless steel needs little or no maintenance. If there is a product required, but is unavailable in Satin Stainless Steel then satin nickel is the closest match as an alternative finish (providing that is available).