Looking for a simple, strong bong attachment? Look no further than the Hoss Glass Build-a-Bong 7mm Top Tube. This tough little tube is made of durable glass and is just 11 inches tall - perfect for topping off any Build-a-Bong setup. The 50mm diameter tube provides plenty of space for your favorite herbs, and the 8.5" length leaves plenty of room for bubbling action. So go ahead and add this tough little tube to your next bong build - you won't be disappointed!