Vacuum Fittings by Odashen. Details: *Slow-release silver ion module, will continue to release silver ions into the water, effectively reduce dust, allowing for a more thorough and hygienic cleaning experience. *As cleaning proceeds, silver ions also continue to transfer to the floor and waste water tank, providing peace of mind during whole-house cleaning, fresh water storage, mop washing and waste water recycling. *This Silver Ion Module can be easily installed and replaced.The actual color may be slightly different from the one in the photos due to several factors, such as monitor brightness and ambient lighting conditions. 2. Measurements may be slightly different due to manual measurement.