Replacement filter elements for filtering shower head, 12 pieces/set. The mineral stone in the stone flow filter shower can also be replaced with this PP polypropylene cotton filter Absorb dirt, dust and other harmful substances in the water, remove impurities in the shower water, and monitor water quality Easy to install, compatible with a of detachable hand showers, just twist the lower part of the body and put the filter cotton. If the shower is relatively short, you can also unplug the blue cover on the filter elements cotton and install it at the shower inlet. It is recommended that you change it every 4-6 weeks according to the water quality Material:PP colour:White Size: 8.5 x 2.5cm Inlet pipe: 4 points of water inlet Note: Please check the size before purchasing, the total length is 8.5cm (as shown in the picture) Package Contents: 12 x filter elements Only the above package content, other products are not included. Note: Light reflection 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.