Sep 12, 2014 · Capacity: 2ml. 1/2 inch round label fits on the top. About 1 1/2" long by about 3/8" diameter. Material: Soft plastic ; Microcentrifuge Lab Tubesare great for liquids, DNA extraction experiment, seed container,food colorings, craft use,geocache containers,use a microcentrifuge to separate proteins from the sample matrix etc