Despite the fact that the description suggests otherwise, these do NOT fit the Harley Benton Beatbass. I contacted Thomann and they confirmed they're too short for this bass. They sent me strings that do fit (Daddario ECB81M) which is nice.
On my Beatbass these Pyramids fit otherwise ok, but the E-string was clearly too short, so this review is based on the other 3 strings. They sound and feel great and you can definitely sense quality in every aspect. Assuming the E-string would be just as good as the rest, I highly recommend buying these if you're after the mellow, round vintage tone and they fit your bass!