Surface:

marbled outside
inside IIID

Upper bottom:

with flat bottom with 3 % incline

fermentation DN40 with residual pipe pulled forward

2x reinforcement profiles

2x crane eyes

Cylinder:
with manhole oval

with sample valve

with ladder hook

with immersion socket for temperature indicator

with clear outlet DN40 with ball valve

Lower bottom:
with residual  drain pipe pulled forward with butterfly valve DN40

Flat bottom with 3 % incline and outlet bead