Compatible Models: This silver ion module suitable for L20 Ultra, for X10 S10 W10S S20 X20 vacuum cleaner. for Clean Water Tank: Easy to install, remove the filter attachment from the bottom of the clean water tank, install the silver ion module and press it firmly into place. Effective Cleaning: The silver ions travel through the water route to the floor, achieving an effective cleaning effect. Timely Replacement: As part of normal maintenance, it can be easily disassembled and replaced, replacing old fittings in a timely manner to work efficiency. Colour:white+blue Material:plastic Package Contents: 4 x Silver Ion Module 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.