"We ordered six box filters to replace the defunct electrostatic filters in our Honeywell system. They were delivered, and we installed them quickly. They fit and work well. Only issue: It seemed to take longer than necessary for the order to be fulfilled. However, I have to confess that these days a lot of us, including my wife and I, are spoiled by Amazon Prime's two-days delivery standard! All in all, good filters, good online vendor. that I would highly recommend to others."