This Distillation Flask is specially designed for petroleum.There is a branch for the fractional distillation of petroleum or other liquid.Usually work together with glass condenser tubes or adapters.

Total there are 4 general sizes:(1#:100ml,2#:125ml,3#:250ml,4#:500ml,5#:125ml(with standard neck))
Size Details:(measured by hand,the real product may have some difference,please understand)

Material:High borosilicate glass,very good light transmittance and heat resistance.
Also accept customized sizes,please feel free to ask us.