... Antibacterial Ceramic ball eliminates the pathogenic organisms in the washing machine, Resisting and killing golden staphylococcus and colibacillus ,alsoactivates the water ... to use :1,put the cloths into the machine, then put the laundry balls, no need to add any general washing detergents ... .W: 13/15 kgsPlease note:1, The Laundry balls can stay in the machine all the time, but it will be better ...