AVS v3 aka UFS
From GG Wiki
UFS a.k.a. AVS v3 - third generation of Automatic Vaping System for GGTS.
New features and enhancements:
- Made of stainless steel and acrylic.
- Has transparent window to watch liquid level inside the tank.
- New system to control separately air- and juice flow into atomizer.
- By default supplied with 510 atty connector.