This 10mm female to 10mm male dropdown is great for moving the heat away from your nice glass water pipes or dab rigs. Moving the heat away from your pipe is very important especially with dabbing. With this dropdown, you can prevent your glass pipe from suffering heat stress, fractures, or damage. These convenient accessories allow you to turn your 14mm male glass pipe into a 10mm or turn your 10mm female pipe into a 14mm. *Exact shape of the downstem may vary slightly.