General purpose columns with a TS 24/40 outer joint at the top for an addition funnel or other reservoir. Coarse porosity fritted disc is sealed in. PTFE plug 821001 (985-41623) controls flow rate. All columns feature a 2 mm PS plug size except 475-21976 and 475-22021, which feature a 4 mm size.
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Colonial Scientific has teamed up with the industry leaders, Fisher Scientific and VWR, and now offers their entire product line. Colonial Scientific provides any part from the Fisher Scientific site with a part number.