Starlab Scientific Co., Ltd screw thread top vials are made of low extractable borosilicate glass. Especially suited for research studies where stability of the glass is of prime importance.
Polypropylene caps have a specially designed septum resin facing PTFE & silicone septa. The white polypropylene is glass-filled to provide extra chemical and heat resistance compared to standard polypropylene. The resin-faced silicone septum is bonded to the cap, providing a permanent connection. 9mm screw thread vials have a 9-425GPI thread and the closure is dimensionally equivalent to 11mm crimp cap vials.