Product details:

The Nature 2 I.g. replacement W28135 cartridge is designed to fit the Professional In-Ground units easily and effectively lowers chlorine consumption. The Nature 2 technology uses silver and copper to sanitize your pool water lowering the chlorine necessary to keep your pool clean and clear saving you time and money. Features Reduce chlorine use up to 50%. Optimizes your system and reduces the effects of harsh chemicals. Family and environmentally friendly. Create a safer pool experience - Residual sanitizing effects continue working long after chlorine is depleted. Dimension - 13.5 x 5 x 5 in.