Filter Elements for Air Pollution Control. RATTS FILTROS has been operating in the Brazilian market since 2003, specializing in the development of filter elements for the control of atmospheric pollution. The company focuses its actions on producing a range of interchangeable models in national and imported equipment, using materials that meet the productive and environmental performances. Joining strategic alliances with international high-tech partners, plus the training of its employees are some of the factors that have made RATTS FILTROS consolidated in the Brazilian market