Product Item:35-250ml Joint 24/29 Filter Funnel Buchner Sand Core G1-G5 Coarse Lab Glass. Sand Core Coarse:G1,G2,G3,G4,G5. Coarse Filters Date G1: 50-70 Micron/um. G5: 2-4 Micron/um. Material:Borosilicate Glass.
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