Just want to say I got them today for my Sanitaire S647 and they are definitely authentic. They came in a 2 pack Eureka. No trash, but universal! I've used them before, as well as those sold in the vacuum store, as well as the generic ones from Revain. There's a difference! Original belts literally last 10 times longer! Normal ones will break in a few weeks. It wasn't just a bad belt or 2. I passed 6 in 2 months! There are differences in the carriers. Pay a little more and they last a lot longer.
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