Airmax SilentAir LR Series Air Filters is a product listed under the Airmax brand. 2 Air Filters, Fits Airmax Diaphragm Compressors. Clean Air Filters Improve Longevity of Compressors. Replace Air Filters Once Every 3-6 Months Specifications and pricing on this page reflect the data published by the source retailer at the most recent catalog refresh. Verify the current listing on the retailer page before purchase.