Ferrules, StandardFerrules, Standard Back to: Standard Ferrules Ferrules, Standard Product Code: 22212 Ferrule, Vespel, 1/4" X 1/4" Pack of 10 Price £55.00 Description Vespel® Ferrules 100% high-temperature polyimide. Stable to 350 °C. Durable, leak-tight. Graphite Ferrules Preconditioned to eliminate out-gassing. High-purity, high-density graphite. Smoother surface and cleaner edges than conventional graphite ferrules. Contain no binders that can off-gas or adsorb analytes. Stable to 450 °C. Vespel®/Graphite Ferrules 60%/40% Vespel®/graphite blend offers the best combination of sealing and ease of workability. Sealed with minimal torque, reusable, and preferred for vacuum and high-pressure uses. Stable to 400 °C. Recommended for mass spec transfer lines. Available in Vespel®, graphite, or Vespel®/graphite.