I tried it without really knowing what to expect. I usually buy the Rigid brand but this came in a pack of two and the price was right. Sometimes that can mean you will be disappointed with the product, but in this case it was a great decision. They work well in my 3 gallon Ridgid vacuum. When I installed the filter I noticed a ridge at the top and was concerned it wouldn't sit quite right, but once I installed it and pressed it onto the bottom it slid right in. Another thing I love about this filter is that it stays on. to washing for reuse. I try to keep them clean and wash the filter to maintain suction while it picks up dust and debris. Ridgid falls apart easily after a few washes. As you can see in the photo, it filters perfectly! I definitely recommend this filter.
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