... 5cmCarton Packaging:5 piece/CartonNegative ions:ozoen generator (ozoniser):1,Use high-quality enamel casting tube, the oxygen purity, stability, ... longe-lived; 2,Use epoxy resin, vacuum packaging high-voltage module, resistant to moisture ... than the photocatalyst. It is the most commonly home- use material adsorption of aldehyde at the present time. High ...