DESCRIPTIONCUT TO SIZE: The waveguide cover size is 15 * 12cm, you can cut it in any size to fit your microwave oven. It is quite easy to cut with sharp scissors or a cutter.UNIVERSAL: Microwave waveguide coverage is universal for all microwave ovens.USE FOR: This mica sheet is usually located inside the cavity on the right wall or on the top wall of the oven cavity. Protect the microwave oven from combustion.Note: Professional installation recommended. Cut to size carefully, make sure it is not short and and make sure oven is disconnected during repair. Do not use undersized or wrong paper size.Mica Plate is mica paper by gluing temperature and pressed. 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.