Answer Margaret, The 5889W2A012F Ring will probably not work with a 10 in. cooking tray. the ring is 10 in. (=/- 1/8 in.) we would expect a smaller rotating ring (9 to 9 1/2 in) in order to support the tray properly. Could you get a model number for the microwave so we can assist you with the proper part(s) needed for your product. Thanks Read More... Answered by AppliancePartsPros.com | Monday, May 15, 2017