Price includes Filtered Air Diffuser face piece, 4 filters and the Steel Back Pan with a 6" neck. For decades employees have been complaining about cold air blowing on them from overhead air diffusers. The Filtered Air Diffuser will eliminate the draft while improving indoor air quality. Features: * 4 way adjustable flow patterns. * 4 Filtered air vents. * Made of durable steel. * Change filteres approx 4-6 months. * Preventsdust build up on ceiling tiles.