This is a real offer. These are official iRobot extractors for Roomba 800 900 series with official iRobot packaging. They fit my 880 perfectly and have improved my Roomba's performance! To get rid of the noise that some reviewers post. The first few times it worked, I heard a slightly louder noise (not a "squeak" but more of a rapid rubber smack). They're a bit noisier than my old ones, but I suspect it's just the fresh rubber rubbing against the rubber a bit. And with each cycle it became noticeably quieter. I didn't notice any marks on my parquet floor. If I had to guess what the initial noise was I would say they just broke since they are brand new. At least that is my opinion. I would say buy them with confidence because now they sound just like my old Roomba used to!