The world's first adjustable downstem is finally here! Not only that this Titan-Stem is adjustable, it is also a metal downstem that fits both 14mm and 18mm female joints. Your downstems will transform from one of the weak points of your piece, to the strongest accessory on your glass bong! When you open your package, you will see that there are 8 individual pieces. Every piece of this metal downstem has a threading, so you can screw each piece into one another, the secret to the adjustable downstem. Each piece varies in size, which allows you to control the length and fit the Titan-Stem into your personal water pipe.If you have a preference of diffuser, then you're in luck! Not only is this downstem adjustable, but it comes with 2 interchangeable diffusers: a standard diffuser and tree diffuser. This metal downstem, created by Ace-Labz, is offered in 5 colors. Choose your color choice, from blue, red, black, silver, and gold. Specify your choice in the above selection box. This is one of the most dependable products in the industry. It is made with durable metal, boasts a modern design, and assists in the filtration of smoke.