Boost downstem for an 18.8 mm joint. The downstem guides the smoke into the bong's water chamber, where it is filtered and cooled before you inhale.

Straight model without a diffuser. Made from high-quality borosilicate glass.

Material: Borosilicate glass
Length: 13 cm
Joint: 18.8 mm / 18.8 mm
Model: Straight downstem, no diffuser

NOTE: Downstem length is always measured from the top edge of the lower joint!