100/pk HPLC Snap Ring Vial Factory Sigma-Aldrich-Aijiren 2ml Closures with pre-cut septa, pk of 100 size 11 mm, Snap cap . Closures with pre-cut septa, pk of 100 size 11 mm, Snap cap, blue polyethylene, red PTFE/silicone, thickness 1.0 mm; find Supelco-29493-U MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich.