Aijiren has 15mm and 24mm screw neck vial, 15mm vial has 8ml and 12ml capacity, and 24mm vial has four types: 20ml, 30ml, 40ml and 60ml. sample vials for GCMS GC MS Vial. 9mm 2ml Short Tread HPLC Autosampler Vial 8-425 2ml Screw Neck HPLC Autosampler Vial 11mm Crimp Top 2ml Autosampler Vial 20mm Crimp Top Headspace Vials 18mm Screw Headspace Vial.