Borosilicate glass 3.3.

• Erlenmeyer shape
• Ground socket to accommodate vacuum tubing of 15 to 18 mm external diameter (e.g. 6×5 or 8×5 mm)
• Fulfil the regulations of the 'Equipment and product safety regulations'

For vacuum use. Filtration flasks with side arm socket have not only made work in preparation and analytical laboratories easier and simpler, but have also reduced accident risk.