Carbon black is utilized as a coloring agent for the black plastic utilized on the cable grips that secure the output and input cables into the EVSE. We apply the warning out of an abundance of caution because the prop 65 standard requires the warning if someone could possibly be exposed. The potential risk, is a risk of inhalation, however in its solid form, there is no risk of inhalation. For more information, please see ClipperCreek's Prop 65 Warning.