They are made of material, the oil splatter guards baffle is excellent and great. Made of premium , and stable. The baffles can protect the cooktop wall. It is the perfect choice to use the oil splatter shield board for keeping the cooktop clean and tidy. Features - Material: Aluminum foil. - They are convenient to put them anywhere when not in use, folding and lightweight, not take up too much space. - Simple and generous design, beautiful and practical, they go well with any decoration style. - The oil-splash guard baffles can prevent oil-splash and heat insulation, reliable kitchen tool. - These oil-proof boards are and practical for use, bring much convenience to daily life. - The baffles help to burns and clean up debris, and are protecting walls during cooking. Package list: 2 x oil guard boards