BBT replacement for ir (Side Brush*6)

After installation, I get about two passes with my vacuum before all of the brushes fall out. I find chunks of bristles throughout the basement floor.

The brushes last two if you are lucky three cleanings. After the 2 or 3 cleanings all of the brushes have fallen out. Do Not use these. They are worthless!!!

A little more robust than OEM and 6 for the price of one pretty much.

iRobot roomba 9splus