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