High-Density Polyethylene. Economically priced funnels with ribs which prevent air lock and speed filtration. The two smallest sizes are high-density polyethylene, the remainder are polypropylene.
Funnel Set (1210B90) includes one each: 50mL (1210B85), 75mL (1210B86), 100mL (1210B87), and 120mL (1210B88). Light weight polypropylene funnels, have ribs which prevent air lock and speed filtration.