These are clearly non-genuine filters priced lower than OEM. Compared to the originals, they appear to be identical except for the missing "E" logo. The filter fits right into my Rainbow E2. The vacuum cleaner does a great job with it. I don't notice any difference. Dust is not thrown out. Fits very tight. Same noise level as the original filter. All is well. I am satisfied with this purchase, especially considering the price. Will update the review if my experience changes in the future. Deserves five stars so far.