I have two Ecovac Deebots. Model 601 and N79S. I had no idea they both use different main brushes. Please note this when purchasing. The main brush is perfect for the N79S (square connector on the rotating end) as advertised however the main brush connection on the 601 is hexagonal and therefore not suitable. I literally can't find a replacement main brush for the 601. I replaced all the original parts on the N79S and this vacuum cleaner works like new. I will probably order an extra kit to have on hand and I highly recommend this item. The parts appear to be of good quality and I expect them to stand up to the rigors of my home with three dogs' pet hair.