20x20x8 Polyester Cube Filter w Wire FrameSelf Seal, Koch 105 701 003 (10 pcs) voomi_id_66585 promoting system efficiency and longevity high quality materials ensuring promoting system efficiency and longevity Applications: Widely used in HVAC systems across commercial and industrial buildings for use in existing cube type baskets without modification to equipment) and in Self Seal style (with an internal wire frame designed to fit standard holding frames without clips or fasteners All four are engineered to provide an excellent combination of efficiency and extended filter life cycles and are available in Standard style (without an internal wire frame