(1) Low Expansion Coefficient: 9mm Screw Thread Autosampler Vials are made of clear Type 1, Class A Borosilicate Glass with very low expansion coefficient. It shows excellent chemical resistance to acidic and neutral solutions, due to its relatively low alkaline content even to alkaline solutions.
(4) Pre-slit PTFE/Silicone Septa: 2ml Amber GC sample vials included blue ABS Screw Cap & Septa (Blue PTFE/White Silicone Liner). The preslit Septa can reduce flat pins curving and When collecting in large quantities, prevent negative pressure from forming in the sample bottle.