【Compatible with】The replacement bags only apply to Roborock S7 MaxV Ultra / S7 Pro Ultra / Q7+ / Q7 Max+ / Q5+ Vacuum Cleaner Dock. Please confirm your device model before ordering. 【Manufacture】Not all parts are genuine. From the OEM factory, the materials used, workmanship and quality are comparable to the originals. 【Premium Materials】The filter bags are made of high-quality melt-blown fiber filter layer and non-woven fabrics, which effectively filter 99% of dust particles and allergens down to 2.5 µm. 【Large Capacity】Dust bag size 16cm/6.3'×13cm/5.1'×15cm/5.9', The disposable dust bag with 3L, captures dust, dirt and pet hair for up to 8 weeks. 【Package Included】8× dust bags. Provides up to 12-16 months of protection for your vacuum cleaners. Usage time may vary depending on usage environment and frequency of use.