Future Way HEPA filter <b>HEPA Filter Size:</b> 15-3/4" x 4-3/4"<br> <b>Pre-filter Size:</b> 15-3/4" x 4-3/4"<br> <b>HEPA Filter Material:</b> Carbon Inter-Layer Fiberglass.<br> <b>Pre-filter Material:</b> Cotton & Activated carbon.<br> <b>Frame Type:</b> Paper.<br> <b>Package Include:</b> 2 HEPA Filter + 8 charcoal pre-filters + 1 use manual.<br><br>