Paul from SWISCO responded:
September 23, 2016
Hello, Yanjun. Our balances do not come with any kind of foam pipe like you describe. I think I have an idea of what you're talking about, but they're uncommon in most windows and only used in specific circumstances. You should be able to re-use your old foam pipes, though. If not, could something like our 26-139 single hole aligner?
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