This blue Grace Glass Precooler is a unique smoking accessory for your bong! It is used as an additional precooler for your smoke before the latter enters your bong and ends up in your mouth. So it furthermore smooths your smoke improving your smoking experience on the whole! It is made of a high quality heat proof borosilicate glass, formed in the shape of a scientific tube. You can place your precious herbs on the blue 3 point bowl, which connects to a percolator through a sure ground of 14.5mm diameter. The blue spiral percolator bubbles up your smoke, for cooling your toke. The blue Grace Glass logo features at the front of the chamber.