They are like real APEC filters, the only thing that confuses me is they have some horrible instructions that look like someone copied them on a duplicator. out. Printed crooked, there are a couple of fairly elementary misspellings, and the last two directions repeat the end of the penultimate in the last direction. this. The last instruction tells you to do exactly what you just did. There's no high level of security if someone can't even verify their own instructions (and that's not rocket science here). Let's hope they're legal! So far, so good.
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