1. High adaptability to real machines, strong practicality 2. Clean and sweep, long service life 3. For NARWAL J4 sweeping robot 4. Strong and durable, not easy to damage 5. Material: plastic/microfiber cloth 6. Size: main brush about 17.8 x 5.2cm, side brush about 3.5cm, dust bag about 21.6 x 6.2 x 9.7cm, rag about 13cm 7. Weight: main brush about 62g, side brush about 10g/pair, dust bag about 34g, rag about 17g
