Microwave Oven Parts Super thick thermal insulation accessories does not contain 4 corners, the size is 4 x 4.27" (9.9cmx10.8cm) 100% quality guaranteed, installation and replacement is very easy Microwave mica chips can effectively prevent water or oil and other substances from splashing on the magnetron or other components during the food heating process, and play a protective role when heating. mica sheet in the microwave oven cannot be cleaned due to serious pollution or the black spot that has been decomposed must be replaced in time, otherwise it is prone to fire and ablation, this which will damage the magnetron over time This mica sheet can be used in many makes and models of microwaves and ovens and can be replaced normally as long as it is the same size and shape as the sheet. mica is simple to install and easy to use. Remember to clean the mica sheet during daily cleaning, and pay attention to keeping it clean and dry. It is recommended to replace the mica sheet regularly, its quality directly affects the function and life of the microwave oven.