Acrylic-Stainless Steel. Peugeot mill mechanisms are recognized worldwide for their durability and ease of use, and carry a lifetime warranty. The clear acrylic surface allows you to see when it's time to refill. Featuring the patented U-Select, corrosion-resistant, stainless steel grinding mechanism that is specifically designed to grind dry sea salt only; not suitable for wet salt or other spices, and allows 6 pre-set levels of grind. Comes partially filled with sea salt. The same unyielding commitment that goes into every Peugeot pepper mill mechanism is also evident in the stainless steel salt and spice mechanisms. Peugeot grinding mechanisms are the choice of food professionals and discerning cooks around the world. They will delight the finest epicures and will provide an original touch to every table.