Tamper-evident screw caps available with either a plug seal or a PTFE faced silicone cap liner (peroxide catalysed 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.

• Easy to see whether the bottle is still originally closed
• Cap can also be used after the first untwisted or breaking of the perforation as "standard" screw cap
• Fully compatible with all the GL 45 threads and therefore highly versatile
• PTFE-coated silicone cap liner option offers tight and reliable long term sealing
• For laboratory bottles with DIN 168-1 thread
• Dims, Ø x h: 66 x 38mm