Used to keep the swimming pool clean by releasing copper and other minerals into the swimming pool.The chlorine-free solar shock replacement copper anode is a secret mixture of metals that kill microorganisms and prevents the growth of metals in the pool.Replacing copper anodes can help you save 80% of your chlorine costs.Suitable for Solar Pool Ionizer Purifier Chlorine Free PurifiersType: Copper Anode for Solar Pool Ionizer PurifierInstallation: VerticalPurifying Position: Terminal PurificationWater Quality Requirements: Municipal Water/Well Watercolour:Copper colorMaterial:Copper alloysize:1.8 x 10.5cmPackage Contents:3 x Copper AnodeOnly 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.