Multi-Layer Air Filtration: An air filter system made up of the 2 melt-blown clothes and 2 Non-woven clothes, the 4-layer filtration keeps the vacuum in the great performance, and locks the dust in the base to protect your family's health. Safe and effective: to 30 bins of dust while keeping the dustbin clean. A self-sealing design keeps dust inside, preventing dust when emptying. We suggest to replace the disposable dust bag every 1-2 months, this item could be used over 1 year. Compatible well with all for Clean Base automatic dirt disposal models, including for S9+, I7+, I6+,I3+ , I4 plus , I3 Plus, I4 Plus, I6 Plus, I7 Plus, S9 etc. Fits well to make you vacuum keep powerful and . As part of routine maintenance, accessories are easy to disassemble and replace. Colour:White+gray Material:Non-woven fabric Package Contents: 6 * Dust bag 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.