Microwave plate and ring (Rockville)

Plate is 11 inches in diameter and in great condition. It came from a Sharp brand, Carousel model that was 12 years old. It may or may not work with other brands or models or years. The bottom of the plate has 3 "teeth" in the center that mesh with the rotating gear inside the microwave. Most microwaves seem to have this kind of setup, but the exact sizes and shapes of the teeth and gear can vary.