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Made of top quality 3.3 borosilicate glass. They should be used with a filtering flask with standard ground mouth reference FFK3. Each funnel has a sintered disc with a different porosity grade: 90-150 ?m (porosity 1), 40-90 ?m (porosity 2), 15-40 ?m (porosity 3), 5-15 ?m (porosity 4)
Ships within 48 hours · Estimated delivery Jun 20 - Jun 25
US$40
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