430 food grade stainless steel. 100% High Quality Anti-rust Stainless Steel with NO Coating on Both Inside and Outside, Which Is Non-toxic and Healthy, Oven Safe for Baking and Fryer Safe for Deep Fry. It is a good Diy tool to fill with your favorite recipe.Great for making filled desserts or appetizers and baking Tube-shaped pastry shell, like cream horn, French horn, popsicle, small ice cream cone, flaky pastry, pizza cones, waffle and shaping pizelle, Big Horn.