2 Pack OEM Trane FLRQB5FR21M11 TFM210B0FR0 - QuikBox Replacement Media Filter MERV 11-20.2" x 26" x 4.7" by MTBioinUS

It requires assembly, but it's pretty straightforward. Works as expected and price is good.

This is a very good product. I have repurchased it many times.

This was a good replacement to my HVAC system. Product works great and easy to slip into its 'compartment'. It was a bit awkward to get it assembled. Getting it stretched out, keeping in position while other side is stretched out wasnt as quick of a job as hoped. Might have been quicker and easier if i had help. However this it not to say its not a good product. Its a great value and product and i will buy this again when i need another replacement.

This was easy to assemble and the price was right

It is tricky at first to unfold BUT they all come this way now so no choice but to buy it. I have a brand new Trane furnace, it is something I have to have & difficult to find. So when you find it grab 2

They seem a bit expensive but considering how long they last the value works out.

Quick delivery, exactly what was needed

Having to assemble a pleated, thin cardboard filter is not always easy. I ended up puncturing my finger from a loose piece of metal wire on the filter after I assembled it and simply picked it up.You need to be extremely careful with this as the material is super thin and can tear easily.This product fits the application properly, yet I still shake my head at manufacturers that use pleated filters for air conditioning units.