Filtrete Micro Allergen Defense Deep Pleat AC Furnace Air Filter， Optimum Airflow Protects your System， MPR 1000， 16 x 25 x 4-Inches (4-3/8-Inch Depth)， 2-Pack</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Actual Filter Size: 16x25x4，Purifies air by capturing a high percentage of household air particles， including those at 0.3 micron which are most harmful to your lungs</li><li>Filtrete Allergen Defense air filters turn your central heating and cooling system into a whole house air cleaner. Featuring electro-static technology， these filters reduce airborne allergens such as household dust， lint， dust-mite debris， mold spores， pollen， pet dander and smog. For best results， change your filter every 6 to 12 months.</li><li>Filtrete 4" and 5 " filters help maintain airflow in heating and cooling systems， which helps prevent stress on the system and reduces the amount of energy needed to reach desired indoor air temperatures.</li><li>Replaces Honeywell， TrionAirBear， Bryant ， Carrier(R) and Lennox (R) brand filters.  Can replace 16 x 25 x 5 inch filters with the same actual size.  It is recommended you measure your current filter or filter slot to determine exact actual size needed for your system.</li><li>Designed with Filtrete Brand 3-in-1 technology from 3M to pull in and trap unwanted air particles while letting clean air flow through</li><li>Microparticle Performance Rating 1000</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/51Yw1e%2B474L.jpg' noproxy></br>