Dr. Greenthumb's X Stündenglass Upstem is made of durable aluminum and works to filter your smoke through water so all the draws you take from your gravity infuser are silky smooth. 

The Dr. Greenthumb's X Stündenglassupstem comes in two sizes: Small and Large.

The small upstem is for the Stündenglass Small Globes and the Stündenglass Pineapple Globe only. The large upstem is for the Large Glass Globe only. 

These upstems are official Stündenglass replacement parts.