This stemless vapor tube from GlassCity features two powerful percs: a dual-level diffuser plate with 12 holes around the edge and smaller disc in the center with another 12 holes, and near the top, a turbine disc with 5 blades that doubles as an ice-catching platform. Together they work to create a roaring, swirling mass of smoke-cooling bubbles for a silky smooth toke! Its stable, round foot and reinforced stemless design make it a durable scientific glass tube. The lower tube and middle tubes (65mm and 50mm in diameter, respectively) offer big volume while the 40mm-wide tube ends with an extra-thick mouthpiece for added comfort. The 18.8mm male joint comes equipped with a heat-proof Pyrex borosilicate glass concentrate nail and a top-load vapor dome with 18.8mm female joint. Near the top, the GlassCity label is engraved into the tube in a bright green hue.