This is the replacement Smok Pyrex Bubble glass tube now available in the UK for the TFV12 Cloud Beast Prince tank by Smok Tech - AKA 'THE FATBOY' this popular sub-ohm tank with a simplistic design is great if you want to hold more juice. The Prince Bubble/Fatboy style  glass tube will make your TFV12 Prince hold 8ml of juice! - more e-liquid for longer! The bubble glass will fit the tanks that now come with the PRINCE STICK, MAG KIT, T-PRIV LUXE and the X-PRIV. 
This smok genuine glass kit includes a pack of O Rings too.

This pyrex glass will only fit the Tfv12 Prince tank. 

SMOK Tfv12 Prince 8ml Fatboy Bubble Replacement Glass #2