Yescom Set of 2 Ceramic Ozone Plates for Popular Home Air Purifiers 4.5" x 4.5" Air Fresh Replacement Parts 2pcs of 4-1/2" x 4-1/2" Ceramic Ozone Plates, ozone output: 360mg/h Can be used for different model of air purifier to fresh air More safe, better for living room and home Recommend to have a rest after running 10mins to 20 mins Easy to install and change