Product review (1 stars): You get what you pay for
I purchased 6 boxes for my Vornado HU1  whole room humidifier.  I'm on my 4th box after 3 months of almost continuous use.  They do not compare to the Vornado MD1 factory wicks. Even at half the price they are not worth it.

1. Although they look like an exact fit, they are not. They are slightly skinnier so they collapse inward.  I solved this by wedging straws to keep them against the ventilation fins.

2.  In the first two fillings the BestAir work just like the factory ones, but by the third filling (36 hours) they diminish by 50%!! Why?  I do not know.  They are plenty saturated.  Mind you, I am meticulous with cleaning the unit and monitoring the humidity in the room.  I have many wooden musical instruments that are valuable and must be kept at 70% humidity.  I have two other humidifiers in the same room running simultaneously that use sunbeam universal wicks. They both put 1 gal of water in the air every 8 hours. They begin to diminish after 3 weeks.  My Vornado with the factory wicks would put 1.5gal of water in the air in less then 12 hours for 3 weeks.  When I switched to Best Air wicks it is now only 1.5gal every 24 hours!  Thats half as efficient as the Vornado wicks. At half the price that puts us about even. Except now I would need to add another humidifier in the room to make up for the inefficiency. No way.  I'm going back to the $14 Vornado wicks or try and cut custom wicks from Sunbeam universal at $10 a box.