Product review (5 stars): Different Wicks Better Results
I use these in a Bionaire WC-6 humidifier because they are  less thick than all the ones that are sold as Bionaire replacements.
Since they are thinner they don't get bogged down in water. Thicker ones do, and then the unit is not putting any moisture into the air and the water tanks never empty . Even if you don't have the impossible to find original wick frames, the thinner wicks  (Honeywell) will stand up and
let the unit work correctly. You get 3 in a pack so if you buy 2 packs you have 3 seasons of wicks for the two tank Bionaire.