This blue Grace Glass Precooler is a unique smoking accessory for your bong! It is used as an additional precooler before your smoke enters your bong and ends up in your mouth. So it smooths your smoke, improving your experience on the whole! It is made of a high quality heat proof borosilicate glass, formed in the shape of a scientific tube. A blue 1x4Arm percolator bubbles up your smoke, cooling this way your toke. It is intended for both oil and herb users. Therefore it comes with a 3 point bowl, a glass nail, and a female dome.The blue Grace Glass logo features at the front of the main chamber.