SIMPLE The test tube is suitable for all kinds of frozen experiment. It can stand and you can use one hand to unscrew the cap, easy and convenient SMOOTH WALL: The plastic tubes can be frozen for a long time: smooth wall and good transparency. Resistance to low temperature, can be frozen for a long time. EASY TO READ: The plastic test tube has 1-5ml calibration, Volume: 5ml. Easy reading of the liquid volume. WIDELY APPLICATION: The sample tubes can be used in hospitals, epidemic prevention station, schools, scientific research laboratory, etc. PRODUCT PARAMETER: Height: 58mm / 2.28". Diameter: 15mm / 0.59". Good sealing cap, samples will not volatilize.
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