Vials, 20mL Headspace vial w/ 20mm AL Crimp Cap & Silicone/PTFE Septa, Kit, flat bottom, 500/pk. 20mL Amber, Crimp Neck Headspace Vial, ND20 Flat Bottom, 22.5 . Crimp Top 20mm Amber Type 1 Glass 20mL Headspace Autosampler Vials w/ Flat Bottom Standard vials for GC and HPLC applications. Writing Patch, No.