Based on this product's specifications, here are some alternatives and similar models
Main Brush for Roborock Saros Z70 (spare vacuum cleaner brush, MPN 8.02.0477)
Summary description:
Replacement main brush compatible with Roborock Saros Z70 (MPN 8.02.0477). Designed as a spare part for the robot vacuum’s primary rotating brush assembly to maintain cleaning performance. Suitable for routine maintenance and brush replacement to remove hair, dust and debris from hard floors and carpets; helps restore pickup efficiency and prolong device life.