The Lua Salt and Pepper Mills feature a grind selector that locks into 5 different positions to adjust from fine to coarse. The top-grind design allows for mess-free storage, and the ceramic grinder won't corrode or absorb flavors or odors. A wide opening allows for easy refilling. Sold filled with sea salt. Materials:Stainless steel, Ceramic grinders, Plastic, filled with Sea Salt Dimensions: 2.5" x 2.5" x 7"