Size I ordered did not fit unit. Carrier unit is over 20 years old and had not been able to find a "real" filter for it. Having to use a flexible fiberglass sheet cut to fit and thought the size I ordered matched....but size was too big since it had rigid form around it. Husband is working on it to try to resize it, but is apprehensive to use it.We did not see an 18 .5" X 26" in stock. Just our Luck!!!!
I was pleased with the purchase as I cannot find the size I need in any stores and it was shipped immediately. They are the best filters I have purchased as they trap so many allergens.
Ordering was fast and easy and the convenience of ordering on line was so much better than going into the stores at this time. Buying filters in bulk also made the cost a lot less than in the store.