Sizing ? 1/8" base for pile weatherstripping
Thanks for reaching out! There is one of our wool pile replacements that does have a 1/8" base but it has a pile height of 1/2", so you would likely need to cut the pile to fit your window but please be aware altered wool pile cannot be returned and I cannot guarantee that it would work. Take a look at the dimensions to see if this might work for you.
Also, you correct, the next smallest size we have is the 3/16". We do have samples that we can provide you with so that you can confirm if they work. There is a maximum of 5 samples and you would only be responsible for the cost of shipping.
Yes, the fin seal you see running down the center of the 58-021 is the only difference. This fin seal helps keep moisture from leaking in from the outside.
These two products are technically interchangeable, but it's important to keep in mind that the fin seal on the 58-021 will add a little extra material overall. It may not seem like much but that will result in additional friction as you open and close your windows, so they may not operate as smoothly. If your windows didn't use the fin seal type pile before, you may want to opt for the 58-002 instead.