Choose Thermo Scientific™ SureSTART™ snap-cap, high recovery glass microvials, performance level 3, to maximize injection volume when analyzing < 2 ml samples. With external dimensions of 12 x 32 mm, these clear and amber glass microvials have an internal V-shaped bottom that provides a relatively high total useful volume and a residual volume of 4 µl. This is a performance level 3 vial, which means it will protect your most valuable samples and provide consistent, reproducible results for your most demanding analyses.