About this Product

Product SKU: HISI-F030

Hi Si always makes scientific glass look easy, and they don't hold back on their downstems. These downstems are diffused with multiple holes surrounding a cylindrical shape. They are for use with a 18.8mm female joint and they have a 14.5mm female joint. These work as a replacement for existing Hi Si tubes and they will work great with any suitably sized pipe.

New Tell us what you think with an Emoji reaction.

Shop Smoke Cartel

Great downstem
"great percolation and cooling, catches ash a lot of you don't use and ashcatcher but highly recommend to anybody with a water pipe with a downstem!! Thanks guys at SC!!"

- Hunter S. Verified Buyer

All products on this site are intended for tobacco or legal dry herb usage.


Made in the USA 🇺🇸

Handblown in San Leandro CA

  • Clear Glass
  • Diffused Downstem
  • Downstem
  • Highest Quality Materials
  • Thick Glass