Bonza 14cm length glass stem 15mm diameter to fit bonza hole - SUITS BONGS WITH A BONZA GROMMET, perfect glass replacement for bongs which come with a bonza metal stem.  If your bong currently takes a 16cm or 14cm bonza metal stem, this is the best fit for your bong. Includes 14mm detachable glass cone piece.

 **This stem is not suitable for glass bongs which have a ground joint opening for the stem, as this does not have a ground joint - it's a straight stem