2mL, Amber Glass, 12*32mm, Flat Base, 9-425 Screw Thread Vial with White Write-on Patch and Graduation Lines. 100pcs/pk. Hplc glass 2ml wholesale 2mL Autosampler Vials with Caps, Lab Amber Vial 100 PCS, 9-425 EASY TO USE: The HPLC glass vial has a large writing patch for sample idification and white printed graduations in 0.5ml increments.