Screw cap microtubes are small containers used in laboratories for storing and handling small volumes of liquids or solids. They are typically made of plastic and feature a screw-on cap that ensures a secure seal, preventing leakage or contamination of the contents. These microtubes come in various sizes ranging from 0.5 mL to 2.0 mL or more, and they are commonly used in molecular biology, biochemistry, and other scientific disciplines for tasks such as sample storage, centrifugation, PCR (Polymerase Chain Reaction), and more.