--Silicone Cover Included --Constructed with high quality stainless steel and a ceramic burr grinder --Our grinder is rust proof with normal use, long lasting, and durable --Upgrade your coffee experience with fresh beans consistently ground every day --Use your grinder to freshly grind hard spices to elevate your cooking --Sturdy, high quality, green product that's reusable and long lasting --Grind is adjustable from fine to coarse (direction on box) We use high quality, 18/8 304 grade stainless steel and ceramic burr to ensure your grinder won't rust and degrade with normal use. Ceramic burr grinders are widely viewed as being the best choice because: --The material stays sharp almost indefinitely outlasting stainless steel --Ceramics create a more "traditional", full bodied coffee flavor than steel --Ceramics don't conduct heat like steel and won't negatively impact the oils in your beans