Zob OG Straight Tube Bong This straight tube from Zob Glass is a perfect everyday driver. This Zob is made of 9mm thick glass instead of the standard 5mm thick glass. It's approx. 14 inches tall, and made of 9mm. American made glass. The pipe has a three-prong ice pinch if you want an icy cold rip! The tube sits on a sturdy glass base. A diffused down stem provides excellent bubbling for cool, clean hits. A 14mm ground glass slide comes standard with the tube. Zob goes to great lengths to make sure every piece is one of a kind, so each label will most likely be different than the one pictured. Features a Three-Prong Ice Pinch. Height: 14.00 inches. Glass Thickness: 9.00 mm. Base Width: 4.50 inches. Down Stem: 6.50 inch Diffused Down Stem. Slide: 14.00mm. Ground Glass Slide. Tube Diameter: 5.50 mm. Made in California.