Product review (4 stars): Ok
They are much Thicker size than the one original came with the Vicki humifier so it was a little more difficult to fit it into place. Read the instructions wet with cool water don't twist to rinse just let the excess come out its own. Works fine putting in now. They don't last too long even when not used and if you have water in the tank you will see the discoloration on the filter. I think I replace them once 6-8 weeks.