Unless otherwise stated, all autosampler vials offered in this brochure (clear and amber glass). Screw Neck Vial, ND9, 1.5 mL, 12x32 mm, Short Thread, Wide . Chromatography vials can be distinguished based on size and finish (thread, crimp, snap). They come in clear and amber glass and with or without writing Fused Insert Vials - Chromatography