45ML Durable Plastic Tubes: The tubes are made of sturdy PET plastic while are made of aluminum. This premium plastic material has excellent practicality and durability. PET plastic also provides a non-, reusable, , safe and not break . Meanwhile clear tubes allows you to quick identify the contents. Compared with glass, it is to use.Leak-Proof: Test tube with screw cap ensures the sealing performance, which is used to effectively prevent sample leakage and it , flat inner surface, no residual solution, its easy to clean, flexible cap, convenient operation and easy to carry.Specimen Collect: Multi-Function test tube, widely used in collecting Specimen in molecular biology, biochemistry, clinical chemistry and other fields. It's a great and value clear test tubes, work for a host of fields, like lab experiment, school, hospital, industrial applications or home use for taking certain measure liquid.Perfect Plastic Tubing: The tube container size: About 140mm. The cap seals well which the most important thing , perfect for DIY bath salt tubes and candy tube containers.Widely used in storing liquid, powder and small objects like jewelry, candy, seed, beads, essential oil, propagate plants or chocolate bean etc.size: Diameter 28mm, height about 140mmMaterial: PETcolor: transparentwhich can be used to storing handmade beads, powders and liquid, very convenient to storage and carryOccasions:Great for Science Party decoration,Birthday or Wedding Party,classroom lab,storing beads for jewelry making,goodie bags,bath salt vials for Christmas gifts,gumball tubes for New Year,candy tubes for Halloween,wonderful supplies.Package Contents:50 x Plastic Test Tubes