20x20x2, Percisionaire 40ldp Merv 8, 80055.022020, Pack12 Media is made of 100% synthetic non-woven proprietary media that can be recycled. Pleat design is a V-Pleat that aids in pressure drop while reducing energy cost and allowing total media usage and provides maximum airflow and dust holding capacity. Frame is a two-piece construction, made of a heavy duty 24 point moisture resistant material. Diagonal and horizontal support members are bonded to the media on both sides. Highest dust holding capacity and lowest pressure drop in the industry. Maintains a mechanical MERV 8 per ASHRAE Standard 52.2. Classified UL 900 Class 2.