Features a tough galvanized steel internal wire frame that forms a self-sealing gasket to prevent bypass. Won't sag or distort like cardboard. Three-stage progressive density media construction enables filter to hold more dirt for longer life. Three versions: Series 153 is 2-ply polyester media with a dry tackifier. Series 15/40 features 3-ply polyester media with a tackifier for higher efficiency. Top of the line Series 6/40 is also 3-ply polyester with superior tackifier and highest dust holding capacity. 24 panels/case. Continuous links and special sizes available.
