Review on Moldex M7020 7000 Prefilter Retainer by Sfl Richardson

I use these nozzles with N95 dust filters to cover P100 HEPA filters. They work very well and sit securely over the cartridges. a little too sure. The only thing that confuses me is that they are really difficult to remove. Mine were threaded, not clip-on. They are also a good auxiliary nozzle when working with thick dust.