Plastic graduated tubes with screw for centrifuge and Laboratory test, 5ml capacity, easily read liquid volume Storage cryogenic liquid nitrogen tank (-180 DEG C), with 5ml printing scale, can be used to store other powders, inks, iron beads, reagents, seeds and so on Glossy sidewalls, good transparency, good sealing, samples will not volatilize, convenient for experimental printing scale measurement Low temperature resistance, can be icing for a long time, unscrew the Cover with one hand, easy and convenient Used in hospitals, epidemic prevention station, schools, scientific research laboratory, ideal for samples, essential oils, perfumes, dyes, model paints, crafts, pearls.