Zob Stemless Inline Diffused Straight Tube Bong This stemless straight tube is from Zob Glass. It's approx. 18 inches tall. This straight tube features a stemless design that replaces the traditional down stem. The smoke gets diffused by a 3 slit inline diffuser at the bottom of the tube. It adds nice diffusion to help filter and cool the smoke before it enters your lungs. There's a three-prong ice pinch for extra chilled rips! The pipe is made of 5mm. thick American made glass, and sits on a sturdy 5 inch wide glass base. The Zob standard 18mm. ground glass slide comes with this bad ass pipe. Zob goes to great length to make sure each piece is one of a kind, so the label will most likely be different than the one pictured.