Our slim-profile disposable TDM for ceilings utilizes the industry's original "mini-pleat" manufacturing process for HEPA/ULPA ducted ceiling modules. Designed and developed to provide the cleanest air for products, personnel, and processes, this TDM is used in unidirectional and non-unidirectional airflow cleanrooms, laminar flow devices and HVAC systems throughout the world. Constructed of the latest generation 41mm (1.61") mini-pleat filter element, our disposable TDM meets or exceeds all industry standards.