powerbox smoke pumpPowerBox Smokepump the world's most successful smoke pump over the last three years motor and electronics protected in a robust, sealed case pump and electronics developed in house by PowerBox Systems pump and electronics produced in our own factory extremely durable, effectively sealed metal geared pump variable flow capacity, adjustable from 0% to 100% adjustable to suit any engine and exhaust system the high maximum pumping rate of 750 ml min. is