The Liebert 305475P1 Filter 25" x 20" x 4" MERV-8 is a high-efficiency air filtration component designed to capture airborne particles and maintain clean airflow in HVAC systems. Manufactured by Liebert, this filter uses pleated media to trap dust, lint, and other contaminants while allowing consistent air circulation. It is commonly used in precision cooling units, air handlers, and ... https://www.partshnc.com/305475p1-liebert-25x20x4-filter-merv-8-nr