AAF International announces the 4-inch PerfectPleat® to complete its PerfectPleat line. According to the company, the 4-inch product offers the same consistent pleat spacing and durability of the PerfectPleat 2-inch models, adding more strength through design enhancements. Each model places a DuraFlex® media pack inside a two-piece frame. Both the standard and HC (high capacity) models are rated MERV 7.

AAF International, P.O. Box 35690, Louisville, KY 40232-5690; 502-637-0326; 502-637-0460 (fax); www.aafintl.com.