MAC Air 4-Person Helmet Air Pumper is constructed using injection-molded ABS polymer housing, optimized for increased airflow. Operating with a high static pressure fan, this model outperforms other helmet pumpers in pressure and volume. Using a dual filtering system, MAC Air enhances performance and avoids premature clogging. The micro openings in the external pre-filter catch most dust and debris before reaching the internal filter. Both filters are washable and reusable. This model has a 4-person helmet outlet, a high duty cycle life motor, a waterproof power connector, and a 12' power cord. Mounting can be achieved with exclusive half clamp bar mounts. MAC Air is built to race.