Borosilicate glass 3.3, with sintered disc filter as outlined below. Autoclavable.

Filter funnel(s)
Funnel(s)
Filter funnel(s)
Funnel(s)
Filter funnel(s)
Funnel(s)
Filter funnel(s)
Funnel(s)
Filter funnel(s)
Funnel(s)
Filter funnel(s)
Funnel(s)
Filter funnel(s)
Funnel(s)
Filter funnel(s)
Funnel(s)
Filter funnel(s)
Funnel(s)