Package: 30pcs 50ml clear flat plastic test tubes with Screw Caps. They are packed in plastic sleeves so that they will not scratch each other during transportation / storage. Material: Made of PET plastic, sturdy and toxic free; Screw caps are made of aluminum. Features: The screw tops easy to open and keep closed. The containers are flat bottomed so they are to stand on their own. The test tubes are durable and do not leak. Use: These transparent flat bottom plastic test tubes are suitable for the storage of candy, bath salt, spices, beads and . They can also be used in scientific experiments, plant propagation and party decoration. Color: as shown Material: plastic Package Contents: 30 x Test tube 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.