Taprite 4 Body Secondary RegulatorSecondary regulators do not connect to your Co2 tank, they have wall mounting brackets.They are designed to connect inline to your primary regulator by a flexible gas line enabling you to adjust three different pressures at the same time. For example, this allows you to have 4 different levels of carbonation in 4 different beers at the same time.

California Proposition 65

Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.