Double Horned. 19mm Joint Size. Made of thick and high quality borosilicate glass. 5mm thickness of glass water chamber area. Single honeycomb for a smooth smoke. Free shipping to USA. The Zong! Is getting very popular due to its awesome design philosophy. The philosophy of having Z patterned necks. The double Horn means it has 2 spikes to make the Z pattern. A major benefit of the kinks or hooks is that they can be functionally used to enhance you grip on the pipe. This should lower your chances of dropping it. The honeycomb disc is essentially a disc with many tiny slits to diffuse the smoke. This type of super diffusion forces the smoke to be super cooled and smoothened when you smoke it. The combination of unique kinks or hooks combined with the honeycomb perc make this one standout water pipe.