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Over the past four years, my original filter had finally clogged with fine dust - primarily mahogany. The clogging indicator immediately dropped to it's original level, and after a few hours, the air in my shop cleared up nicely. The replacement filter was well protected for shipping, and delivered within two days. Removal of the old filter and installation of the new was a tool-less operation that only took a minute or so.
This filter fir the 50-875 like it is supposed too.It is easy to install and it seems to be doing its job.I have noticed that if I take care to clean the outer filter on a regular basis the lifetime of the inner filter seems longer (it might just be in my head).
The filter didn't match the old filter for the 50-868 air cleaner that I have. The old filters, filtered smaller particles than the new. Even Delta tools don't have the same filter that I have been using for the past year. The quality of the filter is not as good.
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