Storage/Reaction Vial, 20mL, Complete, Clear, 28 x 57mm, 24-400 Green Open Top Cap, TFE Septa. For reaction or storage applications, these vials are packaged in a SBS coated white tray complete with SBS partition. Boxes are marked with alpha-numeric coordinates for fast and easy vial identification. Caps are supplied installed on the vials and all sizes have the TFE lined silicone SURE-LINK septa.