Choose Thermo Scientific™ SureSTART™ 0.3 mL Glass Screw Top Microvials, Performance Level 3, when you need to maximize the injection volume for <2 mL samples. This 12x32 mm microvial has a fixed insert that provides a total usable volume of 0.25 mL and a residual volume of 4 ?L. Available in clear and amber glass, this is a Performance Level 3 vial, which means it is designed to protect your most valuable samples and deliver consistent, reproducible results for your most demanding analyses.