1-4mL Autosampler Vials for HPLC, UPLC, GC substandard vials, caps, and septa can lead to sample loss, contamination, and damaged autosampler needles. ... Clear Glass 20ml Headspace Vial 23 x 75mm, Bevel Top/Flat . Vial Kit - Clear Glass 20ml Headspace Vial 23 x 75mm, Bevel Top/Flat Bottom, 20mm Silver Aluminum Crimp Cap w/ PTFE/Molded ...