PREMIUM FILTRATION SYSTEM: Airborne particles are extracted and trapped in your filtration system and not released into the air that you breathe. Not only are these filters capable of intercepting particles down to 1 micron in size, but they’ll help remove those unwanted particles that can contaminate the air and your workshop surroundings. FUNCTION: Effectively cleans the air and removes airborne particles down to 1 micron in size, and are substantially more effective than fiberglass filters. COMPATIBLE WITH: WEN 3410 Grizzly G0738 POWERTEC AF4000, AF4001 Rikon 62-4000 Shop Fox w1830 & others! EXCELLENCE VALUE The package include 3 x 1 Micron Inner Filter Replacement 3 x 5-Micron Outer Air Filters NOTE: This is not an OEM product. Any brand names or logos are the registered trademarks of their respective owners. Any use of any brand name or model designation for this product is made solely for the purpose of demonstrating compatibility.