The test tube is suitable for all kinds of frozen experiment. The flat bottom allows users to use one hand to unscrew the cap. 

• Smooth wall and good transparency 
• Good sealing cap, samples will not volatilize 
• With 1-5ml calibration, easy reading  of liquid volume
• Resilience to low temperature, can be frozen for a long time period
• Used in clinics, epidemic prevention station, schools, and scientific research laboratory

Specifications:

• Height: 58 mm /2.28''
• Diameter: 15mm /0.59''
• Volume: 5ml
• Quantity: 10 pieces per bag
• Material: polypropylene 

 Package size and weight: 

15cm x 15cm x 10cm (5.91in x 5.91in x 3.94in), 0.1KG （0.22lb）