They can be purchased either in clear, or amber color, and in milliliters ranging from 0.3mL to 60mL. Current thread types available for our chromatography vials are: 15-425, ND13, 10-425, 8-425, ND9, ND24, ND11 (Crimp Neck), ND20 (Crimp Neck), ND11 (Snap Ring), ND18, and short screw. Caps and Septa are sold separately.