2ml amber snap autosampler vial for lab chromatography analysis is also equipped with PTFE/Silicone Septa. This 2ml amber snap vial septa can total seal the vial. Aijiren has continued to improve septa to actively reduce leaching, chipping, blocking, pushing, stiffening, and adsorption issues. Rated 4.8 /5 based on 565 customer reviews.