Grav Labs 18.8mm Male Funnel Bowl
Looking for a simple to use, straightforward and durable bowl? You can’t go wrong with a Grav piece.
The 18.8mm Grav Funnel Bowl is made with thick borosilicate glass and will fit any 18.8mm female joint, common in larger bongs. It features a glass “maria” around the stem, which makes it easy and safe to use.
The diameter of the bowl is 1 inch.