Quality material---Made of mica material, eco-friendly and durable in use. Good high temperature resistance, excellent insulating properties. It prevents the efficiency of the microwave oven from being reduced.Cut to Size---Each mica plates sheet measures approx. 116x64 mm / 4.6x2.5 inch, you can use scissors to cut the size of your microwave oven, convenient for replacement.Function---The mica plates sheets aimed to send radiation from the magnetron to the cooking chamber, to prevent food particles from entering the space behind the cooking chamber where the electronic components of your microwave are located. It can effectively protect sensitive electronic components and last the lifetime of the microwave.Wide Usage---As a kind of heat resisting and insulating product. It is widely used for home appliances such as electric hair-dryer, toaster, microwave oven, warmer etc. The microwave oven waveguide cover is universal for all microwave oven.