BRNT Designs makes pure glass accessories, crafted for your enjoyment. Each glass set comes with a glass bowl, and one glass downstem for use with your BRNT Hexagon Ceramic Water Pipe. Please Note: This set is a replacement unit - each Hexagon comes with one bowl and a downstem. Features & Specs. Diffusing downstem for cooler and smoother hits Silicone seal for an airtight fit What's in the Box. 1x - 14mm Glass Bowl 1x - 18/14mm Glass Downstem with Silicone Seal