These White Rhino Hybrid Downstems are crafted with a glass stem and slitted diffuser and a silicone joint with an optional joint adapter. These downstems fit a many water pipes in various shapes and sizes! The joint adapter can be added or removed to function with both pipes and slides with 14mm or 19mm joints. Available in 3 inch, 3.5 inch, 4 inch, 4.5 inch, 5 inch, 5.5 inch, and 6 inch sizes