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SilTite™: Metal Ferrules provide a continuous leak-free connection and are perfect for connecting your column to a GC/MS. The metal SilTite ferrule and nut are manufactured from the same material and will therefore not expand and contract at different coefficient rates. The base of the SilTite ferrule forms a perfect seal with the MS interface, covering the whole transfer interface. SilTite metal ferrules have a temperature limit well above the temperature capacity of the injector, MS interface or GC oven. The taper of the inner nut is designed specifically for the angle of the SilTite ferrule. This ensures an even closure of the ferrule around the whole column to eliminate leaks.