MAC-XC Magnetic Quick-Release for Helmet Air Pumper utilizes Scosche magnets for instant connection / disconnection of your pumper hose to a coupler base mounted on a roll bar. Attach the Magnetic Hose Coupler to the included 12in expandable hose, connect to the Coupler Base and you are set. The set is noted for its simple magnetic connection, ease of break away, and quick connect / disconnect functions. Included in the kit: MAC-XC magnetic helmet coupler, 12-36in expandable pumper hose, and Whip Mount and Bar Mount. It is however important to note that the Whip Mount and Bar Mount are not included when purchasing the MAC-XC only.