1. Side brushes are easy to remove and replace as part of routine maintenance. It is made of high-strength and environment-friendly material, durable in use. 2. Main brush keeps your home robot operating at performance. 3. The Filter is washable. It maintain robot's cleaning performance while reducing infiltration of dust, pollen and other allergens into the air you breathe. 4. For best results, spare parts should be replaced every 2 - 3 months. Compatible Models: For 1C / STYTJ01ZHM For 2C / STYTJ02ZHM For 1T / STYTJ03ZHM For F9 / SKV4093GL / SKV4073CN Incompatible Models: not for 1S/ 2S/ SDJQR01RR/ SDJQR02RR/ SDJQR03RR/ STYTJ02YM/ G1/ MJSTG1/ SKV4136GL Type: Vacuum Cleaner Parts color:Photo color Material:plastic Package Contents: 2 x Rolling brush 4 x Filter 4 x Side brush 2 x Cleaning brush Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.