1. Material: All new nylon filaments (wear-resistant), the old braided bristles have been eliminated, and the new version adopts hair planting technology with a smooth brush disc;

2. Bristle length: 6cm for manual brush, 5.5cm for single/double-head brush, 4.5cm for roller brush and robot;

3. Service life: about 3 years of natural life, or about 120,000 square meters of cleaning area.