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 large 50mm straight tube with UFO perc – which is a tuned dome perc with outstanding function. You have a 14mm slotted stem that stacks bubbles in the base. This goes into the shredding function of the UFO perc. Up top you have a splash guard perc under some ice pinches for a large ice chamber. At 21 inches this is a true large-sized tube bong that shreds with huge function! Filling the top with crushed or snowcone ice really cools things down, and with this level of percolation and a huge ice chamber it’s a really smooth pull. 14mm high quality snap bowl comes with. 5mm tubing makes for a solid piece. This bong has yellow and black Zob labels. Zob Glass is proud to be American glass made in California, and here at Columbia River Glass we only support American glass!