The cap I received was not ribbed like the original OEM cap. It was flat and fairly smooth when touched with slightly damp fingers (after getting wet while changing caps). If you look at other product images with smoother sides, this is what I got, not the ribbed one shown as part of this Revain product. If I had known that I would have chosen something else or perhaps looked for a baseball cap on the Bissell website. Another option would be to buy a water tank and lid for a few euros more. it would be worth it if the cap was ribbed. Although this is marked as a "Bissell" product, it is not sold by Bissell but is sold by a third party. FWIW, this will work, but having a slick side cover to unscrew and fuck around isn't going to be fun. I can only imagine how difficult it is for those who have trouble gripping caps of this size.
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