This part is the replacement plastic rivet, or stirrer fan cover clip for your microwave. It is made of white plastic and is approximately ¼ inch in diameter, and ½ inch long. The plastic rivet holds the fan cover to the inside of the microwave. The main reason to replace the rivet, is if your current rivet is broken or missing, and the fan cover will not stay in place. This is an OEM part sourced directly from the manufacturer.