Tamper-evident screw caps, GL 45, PP, blue-yellow, with PTFE sealing, for laboratory glass bottles with DIN thread

The tamper-evident screw caps are available with either a plug seal or a PTFE faced silicone cap liner (peroxide cured silicone). The integral coloured plastic ring tears when the cap is first opened, and is retained on the bottle neck. Therefore it can be clearly seen if the bottle has been opened after being first sealed. After the initial removal, both caps will still function as “normal” screw cap. Typical applications: secure storage and transport / shipping of valuable media.