90 day filter, 23X more effective than fiberglass filters. Filters airborne allergens including dust, dirt and pollen. Helps reduce dust and dirt buildup in furnace systems and air ducts. Cardboard frame material, made in the USA.
| Filter Efficiency | : | 53.7 % |
| Filter Media | : | Synthetic |
| Frame Material | : | Cardboard |
| Length | : | 25 in |
| Thickness | : | 1 in |
| Type | : | Pleated |
| Width | : | 25 in |
| MERV Rating | : | 7 |
