Filtera.Com now offers MERV 13, 14 and 15 Mini-Pleat air filters in 1", 2" and 4" sizes. These panel air filters are made from 100% plastic, with rigid frames that can be gasketed to eliminate filter bypass. Its large surface area allows for extended filter life and low-pressure drop, making the Mini-Pleat a practical solution for "Green Buildings." Filtera.Com.