I slapped this atop The GRAV 9in Upright Bubbler w/ Tungsten Showerhead Downstem - Clear- and I'm very happy with it. The bub comes with a standard cone shaped bowl and is great for a quick session. This "arcline" is, in my opinion, perfect for a personal hitter. A slightly smaller but much tighter bowl, it allows for more small hits in succession and will even self extinguish if let alone. It doesn't get hot cuz the glass is so thick and it looks dope as ****
Easiest to clean and tough.
Sturdy, looks great on my Grav "Decanter". But small.
Definitely provided a great facelift to a aging bong.