Store your samples in these vials to eliminate leaching of ions while maintaining a consistent pH for the life of your sample. Thermo Scientific™ National™ and Thermo Scientific™ Chromacol™ Sample Storage Screw Thread Vials are manufactured from superior quality 33 expansion borosilicate 51A amber (Type 1, Class B) glass. Storage vials range from 2 ml to 40 ml

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** I make every effort to ship same day ordered, but promised next business day.