Replacement Ceramic Ozone Plate Part for Ozone Generator O-555 and O-777 Models Works only with O-555 and O-777 ozone generators All ozone generators require an ozone plate or in order to work. Ozone (activated oxygen, O3) is created when voltage is applied to the ozone plate/ to create a discharge. This discharge reacts with the oxygen present in the ozone generator chamber and elements in the ceramic plate to create ozone. Colour:Photo Color Material:ABS Package Contents: 1 x Ozone generator ceramic sheet Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 234 hours Hope you have a pleasant shopping experience!