NG-13 inch Ceramic BongThe NG 13 inch Ceramic Bong is definitely one of a kind. It features a flat base that's slightly tapered toward the tube, giving it a sleek and modern look. The ice notches are colored borosilicate glass and the thick mouthpiece and herb bowl roll stopper make for a smooth, easy hit every time. Borosilicate glass: High quality and durable Flat base: Ensures stability Thickness: 7mm for robust usage Base diameter: 120mm for a solid feel Why Use A