Provides greater heat resistance than other PP caps
Teflon®/Silicone septa bonded to cap
Ideal for EPA samples
The polypropylene is glass-filled to provide extra chemical and heat resistance compared to standard polypropylene. The 0.005" Teflon® / 0.120" Silicone septa is bonded to the cap, proving a permanent connection that is ideal for repeal injections. 24-400 screw cap size fits Wheaton 20.25.40. and 60 ml sample vials.