Compatibility: This product includes 6 replacement filters, suitable for Ecovacs T20 series robot vacuum cleaners. Quality: This product is made of high-quality materials, durable and delicate. They fit perfectly with the device and can be used with confidence. Function: This product can filter dust and exhaust gas, protect the engine when idling, and reduce the penetration of dust and other allergens into the air you breathe. Environmentally friendly design: These filters are washable and reusable. Easy to install. Simply remove the dust container, twist and remove the old filter, and replace it with the new filter. It is recommended to replace the spare parts every 2-3 months, depending on the frequency of use of the machine, to keep the machine operating at peak performance. Package Contents: 6 x HEPA Filters. Note: The data are all measured manually, please allow 1-3cm error Due to differences in light and display, there may be some color differences, please refer to the actual