2mL, 12x32mm, 9mm Wide Opening Screw Thread Vials and Inserts. • Write-on patch with graduation for convenient sample identification. HPLC - Molecular Diagnostic Services. High Performance or High Pressure Liquid Chromatography (HPLC) Vial, Screw Thread, 12x32, 1.5mL, Amber Glass, Standard Opening100/PK 200.