Thomas Scientific offers a large selection of ferrules made from PTFE, Graphite, Vespel® and Vespel/Graphite composites. Ferrule sizes refer to the size of the fittings into which they fit; they are not the diameter of the ferrule. (For example, 1/16" ferrules are 1/8" diameter.) …

Reusable Upper temperature limit of 400°C Preferred for vacuum and high pressure. Recommended for MS/GC. One piece design requires no back ferrule.