Details: Features: 50 plastic test tubes with blue caps, 6ml Diameter: 0.51 13mm, length: 3.07 100mm Made of clear polystyrene (PS), sturdy and toxic free, when do some pretty basic experiments and this avoids the whole broken glass issue The plastic test tubes with a tight fitting cap, no rough edges, they are water and air tight, have a good seal, easy to clean Suitable for storage of Jewelry Seed Beads, powder, spice, liquid, live ants and dead specimens etc.; perfect as shot glasses in Breaking Bad themed birthday party; These tubes to replace the glass tubes in my Hummingbird feeders; Great for making mad-scientist concoctions for Halloween; Also can be used as birthday goody bag gifts Package include: 50* plastic test tubes