Has anyone EVER Seen these PreFilters for the Glowforge Filter?

[bill.m.davis]

There has been quite a bit of talk about prefilters. They are a great idea for prolonging the life of an expensive filter!

Here is one that I remember:

I made the portable air filter last 2-3x longer possibly forever

I do the pre-filter thing, it does help catch the bigger pieces and they’re easy to rinse out and reuse. They’re only 1/2" thick and drop right on top of the regular filter inside the case (so doesn’t impact portability at all). Costs $15 for several sheets. According to my Amazon history it was these: