This Is A Microwave Rack! Purchase With Confidence! This Is An Original Part! Don't See Your Model Listed? Send A Message - Happy To Help! Microwave Models Have Varying Rack Diameters! Do NOT attempt to use this rack when using your device in the microwave mode! This High or Tall rack is great for two level cooking! This item originally shipped with the following Sharp Microwaves: R1851A, R-1851A, R1874, R-1874 This rack is to be used when using your device as a Convection Oven. The high and low baking racks can be removed for easy cleaning and stored away from the microwave oven when racks are not needed. After each use, wash them in mild, sudsy water. For any stubborn stains, use a mild kitchen cleanser and scouring sponge as described above. They are dishwasher-proof. Do NOT attempt to use this rack when using your device in the microwave mode! If your Microwave is NOT listed above, please send us a message so we may help you obtain the correct part!