Chromatography vials - crimpers Vials, EPA, borosilicate glass, 20mL and 40mL, Thermo Scientific Chromacol® Vials, borosilicate glass, scintillation, 20mL, Thermo Scientific Chromacol® • Class 100, Class 200 pre-cleaned and Class 300 pre-cleaned certified available • Noise = 2.28 • Background count = 13cpm • Quenching Index Factor = 49