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Polymethylpentene (PMP) long-stem filtering funnels for filter paper are made of durable “glass clear” plastic, but are not intended for vacuum filtration. The funnels provide very rapid filtration using standard filter paper. They come in four sizes.
These “glass clear” plastic funnels are very durable but not intended for vacuum filtration. Unique helicoid internal ribs provide very rapid filtration using standard filter paper.