Is this the part you've been looking for? The Stundenglass Upstem is one of two diffuser downstems situated inside each of the globes on the Stundenglass Gravity Pipe. As you rotate the bong on its axis, the Upstems filter your smoke through water and are imperative to the functionality of the gravity bong. If you're dealing with a broken Small Upstem, or just want some fresh replacements, this is the accessory for you. The Stundenglass Small Upstem is designed for use with the Small Globes Kit, or smaller Stundenglass Kompact Gravity Pipe.
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