Vision STV Nova Tank Clearomizer (3.5ml) $10.99

It is a Vivi Nova with a viewing window tube, which consists an inside clear plastic tube and an outside metal tube with viewing window.

STV Nova is easy to assemble or disassemble them like Vivi Nova. Just screw on. Maintenance and cleaning become easy.

It can use the same screw-on coil heads (long wick), same metal base and same metal cap as Vivi Nova Tank Clearomizer V3.

The only difference between STV Nova and Vivi Nova is the STV Nova's tube with a viewing window, so you can see the ejuice level easily.