Suitable for Moosoo K12 K12 Pro K13 cordless vacuum cleaner. Made of high quality material, it can block 99.97% of dirt, sawdust, dust, wood chips, pet hair and other small particles. Thus, it can reduce dust and other allergens in the air you breathe. < p>With normal maintenance, it is easy to install, just take apart the dust container, twist it and remove the old filter to replace the new replacement filter. Washable and reusable K12 filter. It is recommended to replace the vacuum cleaner every 2-3 months to maintain the best performance. Package Content: 4 x Filters. Note: The data is all measured manually, please allow 1-3 cm error due to light and display differences, there may be color differences, please refer to the actual item received.D