11mm Crimp Vial Supplier--Aijiren Vials for HPLC/GC. The Aijiren 2ml crimp autosampler vial requires an 11mm crimp finish and requires an aluminum seal closure. Crimping aluminum caps are superior seals than screw caps and snap caps. In addition, crimp caps are resistant to high temperatures. However, a 2ml crimp autosample vial requires tools