Great price compared to over priced Roomba branded parts. However, there is probably a reason. Filters, brushes and bags look ok, not as good quality as the Roomba brand but then again the price. The new rollers rattle, outwardly identical to the original, but my typewriter is louder and makes a rattling noise. Exchanged old ones, the noise was gone, sent new ones back. Rattle. Can I live with that for the price? Bye. I'm not sure I would buy roller skates again.