Short Thread Cap, 9mm, Open Blue Polypropylene, Red PTFE/Silicone/Red PTFE Septa; 1000/pk

No more damaged autosampler needles or sample loss|Ensure septa is not deformed due to overtightening and extend the life of your needle Prevent sample evaporation due to poor vial-septa-cap sealing UltraClean? high-purity septa are optimized for GC and headspace analysis Select caps with UltraBond?? septum to avoid sample contamination|PTFE/silicone/PTFE septa features PTFE laminated to both sides of high-purity silicone prevents coring|Designed with a blue open cap with red PTFE laminated silicone septa|Short thread polypropylene caps fit short thread vials. Caps are available in different colors, septum materials, and open or closed configurations to suit your application. UltraBond cap and septum form a one-piece unit with a bonding process without adhesives for contamination-free results. Pre-slit septa prevent a vacuum forming inside the vial.