Product review (5 stars): Works great!!!
I purchased this filter for my Lasko filter and it fits perfectly and works great.  In combination with the BestAir 246 Golden Solution II Combination Water & Bacteriostatic Treatment, the filter has worked for over a couple months and it is still in great shape.  I also flip the filter every couple of weeks to ensure even wear.  I would recommend these for your humidifier as they are much less expensive than the Lasko filters and work as I would want them to!