Seller notes

Replacement filter set for Harbor Freight generator 4000W/3200W and 4375W/3500W models. It is shipped un-oiled; add a couple drops of oil to the filter and squeeze/work it for a minute in the supplied bag, then install. New filter design began production for models sold starting in 2018 under 63090. I *strongly* recommend you physically inspect filter prior to ordering to see what Harbor Freight used in your model. Filter measures 4.25" x 4.25" x 20mm FAQ: How do I oil the air filter? Put ~3-4 c...

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