The new Amsterdam Limited Edition Oil Bongs is made of high quality borosilicate glass, the thickness of the glass is 5mm and formed in a special bent neck shape. It comes with a slitted chillum percolater. The bong is 22 cm of height and the glass and the chillum is 14.5mm. It comes with oil bowl. This bong have a nice hand grip and it easy very easy to take everywhere, it fits in a travel bag!