This is exactly the size we needed, exactly as pictured and affordable compared to local prices. The website states that each filter has a lifespan of up to 3 months, so it's a good "bulk buy" for a year's supply of filters needed for the home (unless you have more than one vent , which needs to be filtered)! I really like that the filters are made in the USA and designed to work in spite of the heat (up to 200°F) and humidity - although I can't imagine a home heating system going up to 200°F!
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