Black Leaf 9mm Straight Ice Bong | 35 cm This sturdy straight tubed ice bong by Black Leaf has been constructed from top quality 9mm thick, heat resistant borosilicate glass. Measuring 35 cm / 13.8 inches in height and equipped with a 12mm thick circular foot this straight tubed ice bong has been made to last. It has an 18.8mm ground joint and comes complete with a removable 18.8mm > 14.5mm slitted diffuser downstem and a 14.5mm male herb bowl with a small marble roll stopper, which prevents it from rolling off surfaces. The three, blue colored, ice notches enable you to place a few ice cubes in the bongs tube to further cool the smoke and they also double up as great grips. The smoke gets cooled and filtered through the submerged slits in the diffuser downstem before continuing up the tube, passed the ice notches and out of the comfortable rimmed mouthpiece. A carb hole with a removable rubber plug can be found on the rear of the tube for extra control of your hits. The front of the tube is decorated with black and gold Black Leaf decal and a gold 9mm certification star stamp. This solid borosilicate straight glass ice bong by Black Leaf makes light work of filtering and cooling your hits for a more enjoyable, full flavored smoke. Check out our range of Black Leaf bongs, bubblers and accessories at Grasscity.com.