2ml 12*32mm Vials, flat base, celar and amber Standard Opening Crimp Top 8-425 1. Narrow neck crimp top vials fit many older GC autosamplers. 2. Compatible with all 11mm crimp seals and 5mm nominal diameter inserts Wide Opening Crimp Top 9-425 1. Easier to fill 2.Used with either 11mm aluminum seals Standard Opening Screw Thread 8-425