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 cartridge in order to work. Ozone (activated oxygen, O3) is created when voltage is applied to the ozone plate/cartridge to create a corona discharge. This corona 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 shooting 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.