Polypropylene funnels are available in two capacities: 100 ml for the 0.7, 1.0 and 1.5 cm ID columns and 700 ml for the 2.5 cm columns. The funnels are used for initial column packing and as a small buffer reservoir.
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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.