2ml Screw Cap found in: LabForce Screw Cap Microtubes, LabForce Screw Caps for Microtubes, Screw Cap Polypropylene Microcentrifuge Tubes; 2.0mL, LC.. and 2.0ml screw cap vials molded from high precision mold and high purity resin.Screw caps deliver leak-proof seal for all types of contents, ideal for life science reagent or solution.