Single Shower head percs makes this pipe a unique collectors item! Super thick 4-5mm glass. Features: Single shower head bulb percolator shaped like a mushroom. Inline stemless design. Forced percolation at the stem. Joint size: 14mm. Includes dome and nail for smoking oil concentrate tobacco products. An absolute beauty engineered to perfection. Dimensions. Width of lower water chamber is 2 inches, which means it is fairly large and a very heavy duty pipe for an 11 inch tall piece. Width of the base is 4.1 inches. The beauty of this pipe is its engineering and design. The smoke starts off by going through the inline stem and is diffused by the 4 slots, which create a ton of bubbles. It then goes through the showerhead percolator. The shower head has tiny diffuser slots to diffuse the smoke. This means the smoke will be super cooled to make for a very smooth smoking session.