Tube is made of PEI, although a strong one, please be careful if you use tank cracker juices, like cinnamon, strong menthol, citrus, cola, etc.
This is a bottom fill tank section only, you need a Dvarw MTL FL 22 deck to have a working tank.
Total length of the tank (deck+ultem tank section) and capacity without drip tip and the 510:
2ml 27,1mm, 2,4ml
3,5ml 27,6mm, 3ml
5ml 34,6mm, 5,2 ml