Unfortunately they dont have that same fit as my name brand ones did. Which allows airflow to go around the filter instead of all the flow going through the filter as should. Particles will be able to escape around the filter and into my breathing air.
I usually use Honeywell, size 16x25x4. Your filters were ordered in that size but are smaller and not the quality of the Honeywell brand. I installed one and will use them but will not be a repeat customer. Your company sounds great and I wish you the best. Lucille Mosur