This straight adapter is made of robust borosilicate glass with SG 19 attack (18,8mm) on both sides (one side as male, the other as female). This means it fits the bongs with SG 19.

The adapter works well as an intermediate fume filter. You need to use a suitable retina (diameter 15 mm) and then fill in activated charcoal. Next, insert the brazier into the adapter.

Active carbon reliably absorbs unwanted substances that are formed during combustion, such as tar. The taste is softer, the lungs are saved and the bong remains clean longer.