Test
Certified Bonded Closure, 9mm, Blue, Natural PTFE/Off-White Silicone Ultra Low Bleed Septa, for LC/MS and GC/MS. Certified Bonded closures feature clear PTFE/Silicone bonded directly to the closure without the use of glue or adhesives. These bonded closures provide a cost effective, integrated, one-piece system that eliminates costly line fallout.