Removable 18mm (SG19) glass tube for water pipes.
Glass tube (test tube/downstem) replacement for water pipes with an 18mm connection (SG19). Fits an 18.8mm device connection and an 18.8mm male bowl on the top side.
Main features:
- 18→18 connection: compatible with water pipes with an 18.8mm joint and an 18.8mm bowl.
- SG19 = 18.8mm: the common standard in glass devices.
- Borosilicate glass: heat and scratch resistant for daily use.