The Variflow II-M is a high-efficiency mini-pleat air filter available in two ratings: 90-95 percent MERV 14 models and 60-65 percent MERV 11 models. They are UL Class 2. The Variflow II-M is an extended surface, rigid cell filter with metal cell sides and mini-pleat construction. Pleat separators are manufactured with beads of high-strength adhesive for consistent spacing, smoothest airflow and lowest resistance. A rigid pack design makes it ideal for the turbulence, variable air volumes and frequent fan shutdowns common in industrial and commercial air handling systems. An ultra-fine, depth-loading microglass fiber media and water-repellent binder, allows it to maintain high efficiency, even under high humidity conditions.