Greyhound 1/4" To 6.5 mm Vespel/Graphite Ferrules.

Made from 40% graphite and 60% high-temperature DuPont polyimide. The upper temperature limit is 400° C.

The one-piece design does not require back ferrules. Ferrules have precision-drilled IDs so there are no mold imperfections. Vespel/Graphite ferrules can be reused; they do not sieze onto the column. They are recommended for GC/MS interface applications.