Active Air Pre-Filter for ACCF3910, 10" x 39" commercial-lighting-fixtures or as a cleaning agent

or as a cleaning agent

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Active Air Pre-Filter for ACCF3910, 10" x 39" commercial-lighting-fixtures or as a cleaning agentDescription Extend Your Filter's Life: Enhance the durability and efficiency of your Active Air carbon filter using the matching Active Air pre filter. These pre filters restrict larger particulate matter such as dust and dirt from impeding the working surface of your filter which aids in keeping your carbon filter functioning at peak levels for an extended period. Replacement becomes necessary only when after several weeks, the pre filter appears