Wide Compatibility: Dust bags compatible with for Ecovacs Deebot X11/ X11 Pro. please check your machine model before purchasing Multi-Layer Filtration System: The dust bag consists of three layers of high-density fabric and one layer of activated carbon fabric, which can easily filter large dust particles and eliminate unpleasant odour Activated Carbon bag: With activated carbon, x11 dust bag not only effectively filters 99.9 % of dust particles and allergens down to a size of 2.5 µm, but also filters out odour to keep air fresh Large Capacity: The 4-litre capacity dust bag can be used for up to 90 days and retains its performance even after prolonged use Compatible with model: For Ecovacs Deebot X11 For Ecovacs Deebot X11 Pro Specifications: 10 PCS / 12 PCS Color: White Material: Non-woven fabric Package Contents: 10 * Dust Bag / 12 * 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.