ALWSCI Ultraclean Vials for Chromatography Kit, 2 ml 9 mm HPLC Vial, Amber Autosampler Vial with Graduation, 9-425 Blue Screw Cap with Hole, Red PTFE&White Silicone Septa, 100 of Pack Color:Amber Autosampler Vial (4) Black Coating will not
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ALWSCI Ultraclean Vials for Chromatography Kit, 2 ml 9 mm HPLC Vial, Amber Autosampler Vial with Graduation, 9 425 Blue Screw Cap with Hole, Red PTFE&White Silicone Septa, 100 of Pack Color:Amber Autosampler Vial (4) Black Coating will not (4) Black Coating will not easily wear off over time The combination of natural extracts such as propolis