3M Ultra Allergen Reduction Deep Pleat 4″ Filter, 2-pack @ Costco – $38.99 + tax + 5% surcharge for non-members

I was in the market for 20x25x4 filters and found that they were $11 off at Costco till 10/25
16x25x4 also available for same price. Apparently the 16x20x4 is available too but I can’t get the discount to show up in the cart.
Limit of 5 orders.
https://www.costco.com/3m-ultra-a…59711.html