This is not an OEM part. It's not authentic. It's made out of wood, not plastic, and doesn't have a contoured design that seems to make it easier to pick up dirt from your floor. However, at least for now, it looks like it will work. Our 6.5 year old Lift-Off Pet Revolution 18Z6 stopped turning the stirring brush. First I tried changing the belt (BISSELL Lift-Off replacement belts, 2pcs, 3200) and that made the old agitator spin, but then after 5-10 seconds it stopped. I have noticed that the two end pieces on the roller are no longer spinning freely and have purchased this item as a replacement. Putting in this *wooden* aftermarket replacement got us vacuuming again. I tried to find the correct part number on the Bissell website. . They state part 203-2448 works with 18z61. So if you want to switch to OEM, maybe this is the best option? I assume the 18Z61 and 18Z6 will use the same parts. See Bissell OEM 13.5" brush roll for Cleanview Helix, PowerForce, Rewind 203-2448.