Package Included: You get 36 plastic bottles, measuring approximately 20.5 mm diameter, 59.5 mm height, inner diameter: 14.5 mm, capacity: 5 ml (0.17 fl oz). Enough quantity to meet your needs. : The 5ml centrifuge tube is made of plastic, to high and low temperatures, and can be freeze for a long time. It has good air tightness, no leakage or evaporation, and can be used safely. Easy to use: Each graduated plastic centrifuge test tube has a screw cap, you only need to unscrew the screw cap, pour the material into the tube, and then tighten the screw cap without worrying about leakage. Storage Box: These test tubes come with a storage box that is very easy to use and store, helping you keep your experiments clean and organized. Wide range of applications: These small sample tubes can be used to hold liquids, solids, powders, seeds, pills, essential oils, perfumes, dyes, granular objects and more. Suitable for hospitals, research laboratories and other places. Material: plastic colour: As shown Package Contents: 36 x freezing tubes 1 x plastic box Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.