These durable, ceramic ozone plates are manufactured by RainFresh Air. ; They fit all of the following air purifiers: RainFresh Air 3500, Healthy Living, Spring Air, Alpine Ecoquest Living Air: Classic, XL-15, Bora, Breeze, Eagle, Flair, Fresh Air, Salon Air, and Ozone Blaster, Lightning Air, and Natures Air Purifiers. They will not fit the pine 8. 80; Size: 4 1/2 X 4 1/2