Comparison : Item # 3190-02, Micro Distilation Apparatus, Falling Film Molecular Still, 14/20 Joint Size, 575mm Overall Height
Item # 3190-04, Mid-Size Distilation Apparatus, Falling Film Molecular Still, 24/40 Joint Size, 680mm Overall Height
Item # 3190-06, Standard Distilation Apparatus, Falling Film Molecular Still, 24/40 Joint Size, 790mm Overall Height