Feature: Main material: Made of high-quality materials, environmental friendly materials, soft and durable to use. Easy to install and remove, no need to spend extra energy and time. Pre-motor filter: the washable pre-motor filter ensures a long-lasting suction performance and a long service life of your vacuum cleaner. It is recommended that you replace it 2-3 months or according to your usage to keep the machine running at best performance. Suitable Model : FOR QX9-1-50IB ASKQX9 Vacuum Cleaner HEPA Filter:Mainly acts as a dust-proof, intercepts garbage and debris,Filter fine dust, filter and clean dust generated by dust and , and reduce secondary pollution of air . effectively help Robot Vacuum Cleaner dust. Material:plastic colour:As Shown Package Contents: 6 x Filter Only the above package content, other products are not included. Note: Light 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.