This 4.5" GRAV Fission Downstem is made out of 2mm thick borosilicate for durability. Swiss-style holes at the bottom of the downstem break up your smoke into tiny bubbles, providing a smoother hit than traditional downstems. It fits into 18mm female joints and can be used with 14mm male bowls and accessories. The GRAV Fission Downstems are an easy way to upgrade your existing setup without needing to buy a whole new piece.
GRAV is known for its quality scientific glass pipes and water pipes, as well as innovative designs like the Helix, STAX, Arcline, and more. Aside from scientific glass, GRAV Labs also manufactures high-end vaporizers and accessories. They've been leading the industry for over 10 years and have created some of the most recognizable products for consumers around the globe. What sets GRAV apart from other brands is that they created an inexpensive product that looks awesome, and works like a charm.