Main purpose: well timed substitute can upgrade the cleansing performance and hold the engine. The counseled substitute time is 1-3 months Main material: Nylon brush can help you remedy maximum cleansing problems, HEPA clear out can efficiently help the robot vacuum cleaner to gather dust. Applicable models: for Xiaomi Mijia STYJ02YM / for VIOMI V2 PRO / V3 robot vacuum cleaner Model Number: For Xiaomi Mijia STYJ02YM/for VIOMI V2 PRO/V3 Vacuum Part Type: Filters Type: Vacuum Cleaner Parts colour:As shown Material:plastic Package Contents: 1 x Main Brush 4 x Side Brush 2 x Hepa Filter 1 x machine Only the above kit content, different merchandise aren't included. Note: Light shooting and various reveals can cause the colour of the item within the photo just a little diverse from the real thing. The size allowed error is +/- 1-3cm.