Review on Enhance Your Shark ION Robot Performance with SOFOXYI 6Pcs Side Brushes Replacement Kit – Compatible with AV751 R85 RV850 RV850BRN RV850WV S87 RV851WV RV700_N RV720_N RV750_N by Maria Botello

I bought a set of 6 replacement brushes. I put the first 2 on my Shark Ion and they lasted 2 cleaning cycles. Then I replaced them with the second 2 and they only lasted 1 cleaning cycle. I then replaced them with the last 2 and they lasted 3 cleaning cycles. At this rate it will be cheaper to buy a new Hai-Ion. I wouldn't waste your money on these replacement brushes. Very cheaply built.