First of all, you can't go wrong with any replacement part Stens makes.
That said; it is always important that YOU make sure that the part that YOU
order is the right one for what YOU are working on.
Sadly, the part that I ordered was not the right one for what I was working on.
This was MY fault not Stens or SLE.com's. Good News tho, I was able to make a replacement air filter to the orininal specs from some Foam rubber that I salvaged from an old cushion. I will still use Sten parts from SLE.com as their service and quality are very good.