High functioning science glass from Zob Glass out of California. “Instrumentum Percolatus” is their moniker as they make science glass with insane function through elaborate percolation. This is their straight tube bong with their eight arm tree perc. You have a 14mm slotted stem that stacks bubbles in the base. This goes into the shredding function of an 8 arm tree perc. Up top you have a splash guard perc under some ice pinches for a small ice chamber. At 15 inches this is an easy to handle tube bong that shreds with big function in a medium piece! Filling the top with crushed or snowcone ice really cools things down, and with this level of percolation it’s a really smooth pull. 14mm high quality snap bowl comes with. 5mm tubing makes for a solid piece. This bong has green and white Zob labels. Zob Glass is proud to be American glass made in California, and here at Columbia River Glass we only support American glass!