Function: 1. Excellent Dust Resistance: Excellent dust resistance, our high performance spare parts are manufactured under strict quality control, so that the sweeper can operate with high efficiency. 2. Manufacturing Material: The double sweeping brush is made of high-strength bristle material to get more dust. The main brush made of high-quality rubber and dense bristles effectively and thoroughly removes dust and stains from the floor. 3. High-performance air filter: effectively captures microparticles. Durable plastic filter box, the filter box can be reused and cleaned. We recommend reusing filter boxes to reduce plastic waste and protect our planet. 4. Wide range of applications: With a wide range of applications, high compatibility, it is perfectly suitable for Proscenic 850T cleaning robot. 5. Easy to Use: Easy to use and fine workmanship. Without any difficult requirements even though you are using it for the first time. Specification: Item Type: Robot Vacuum Cleaner Parts Weight: approx. 189g / 6.7oz Material: ABS high efficiency particulate air filter bristles Applicability: Suitable for Proscenic 850T sweeping robot Package List: 4 x side brush 3 x Rags 3 x filter mesh 1 x brush 1 x blue flat piece