2-PERSON HELMET AIR PUMPER BUNDLE MOOSE - 0136-0066Features Stay cool and eliminate dust with the MAC Air helmet pumper Four lightweight, expandable pumper hoses Utilizes a dual filtering system that increases performance and prevents premature clogging External pre filter features uniform micro openings that filter out most dust and debris before it can reach the internal filter Constructed using injection molded ABS polymer, the housing is optimized for increased airflow Rocker Switch Variable Speed