Dear, provide prices and availabilities for these two items:
1) 250ml-Lab-Glass-Chromatography-Column-ID-30mm-Column-Length-300mm-with-Teflon-Stopcock (2 items needed)
2) 125ml-Lab-Glass-Chromatography-Column-ID-20mm-Column-Length-300mm-with-Teflon-Stopcock (2 items needed)
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