Authentic SMOK BULB PYREX GLASS TUBE #5 piece for the use with the TFV8 (EU/2ml) Baby Beast Made from high quality pyrex glass these items will extend the life of your favourite tank and the size giving it a whole new dimension.This glass piece will not work with older pre tpd 3ml version of the TFV8 Baby Beast tank.22mm Diameter x 16.5mm Height26.15mm = Bulb Diameter.