Precoolers serve as precooling and also capture much of the dirt. Do not forget that the precooler does not go directly into the bong, but it is necessary to use the adapter, put it in the bong and then connect the precooler. Exceptions are bongs that do not even have a boiler in the base unit connected to the bonnet by means of an adapter or, they do not even have chillum. We offer basic precoolers at discounted prices, but you will also find stylish pieces with imaginative percolations that will delight every demanding user.