HPLC and GC-certified, tested for blank values and impurities. Kits each with 100 short-thread screw top vials ND9 made of borosilicate glass from Vials, 1.5mL Clear Glass Vial Only, Short Thread Vial, 12 x 32mm . 1.5ml short thread vial, 12 x 32mm, clear glass, 1st hydrolytic class, wide opening (9mm.) Use caps with PTFE/silicone standard or