Description Replacement for 3M A1 Filter by Swift Green Filters SGF-A1 The Swift Green Filters SGF-A1 commercial water filter is a compatible 3M replacement providing fresh, clean, and great tasting drinking water.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.