Switch Up Your Function

Premium Quality Bong Downstems

A cracked downstem shouldn’t bench your bong. Castle Glassworks stocks precision-made replacements to match your piece. Measure your existing stem (or check our Downstem Fit Guide), and we’ll get you back to smooth filtration fast.

No leaks, borosilicate glass with snug joint seals
Diffusion options, from basic slits to multi-hole percolation
Measured for your bong
Thick glass that won’t snap during use or cleaning

Replace or Upgrade—Your Call

Need a quick fix? We’ve got stock downstems that fit most bongs. Want better filtration? Try our upgraded diffusion stems for cooler hits. Either way, you’re back in business.