Bent Adapters Craig Tube A137 Series) and adds two

A137 Series) and adds two 4 mm drain holes at the base of the inner tube to allow efficient solvent return to the evaporation flask

increasing surface area to improve vapor-liquid contact for efficient fractional distillation

This glass Buchner filtering funnel contains a built-in glass fritted disc with a choice of Fine (F)

The transparent design eliminates the contamination issues commonly associated with fritted discs and improves visibility compared to traditional porcelain Hirsch funnels

while 250 mL funnels are equipped with a 4 mm stopcock

Bent Adapters Craig Tube A137 Series) and adds two75 bent distillation adapter. Standard taper inner joints at both ends. Made of borosilicate glass for excellent chemical durability and mechanical strength.