Zob OG Straight Tube Bong This straight tube from Zob Glass is a perfect everyday driver. It's approx. 14 inches tall, and made of 5mm. 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: 5.00 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.