Features: 1Simple installation method it is easy to replace and use made of high quality materials durable and sturdy has a long service life. 2Using high strength environmental protection materials it can reduce the occurrence of dust pollen and other allergens entering the air you breathe with high efficiency and strong water absorption and good cleaning performance. 3Washable design it can be reused easy to clean in order to get the best results the filter should be replaced every 23 months. 4High adaptability it can be perfectly adapted to the corresponding replacement location you only need to remove the original accessories and find a suitable location to install it. 5High quality filters help improve the performance of the sweeping robot and prolong the service life of the machine. Specification: Item Type: Filter ElementWeight: Approx. 72g / 2.5ozMaterial: ABSProduct Compatibility: It is suitable for 500 series and 600 series such as forRoomba pet version 528 536 551 552 564 580 595620 630 650 and other sweepers.Product Size: Approx. 12.3x8x4.6cm / 4.8x3.1x1.8in Package List: 3 x Filter Element