Used to keep the swimming pool clean by releasing copper and other minerals into the water. The chlorine-free solar shock replacement copper anode helps control microorganisms and inhibits algae growth in the pool. Replacing copper anodes may reduce chlorine usage. Solar ionizer replacement basket helps capture copper particles released from the anode during ionization. Compatible with various solar pool ionizer purifier systems. Material: Nylon + copper alloy Color: Blue + copper Copper rod: 105mm long, 18mm diameter; weight 228 g (0.5 lb) Spring: stainless steel 316 material, length 125mm, diameter 40mm Basket: nylon material, length 120mm, diameter 68mm Package Contents: 1 x Filter Screen 1 x Copper Anode 1 x Spring 1 x Bolt 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 to vary slightly from the actual product. Measurement allowance is +/- 1-3cm.