100% graphite Made of high-purity materials that will not contribute background impurities for sensitive and selective detectors Designed to seat securely in a variety of chromatography tube and pipe fittings High-density and contain no binders that can off-gas or absorb analytes With a smoother surface and cleaner edges that conventional graphite ferrules Ferrules are very soft and can be easily deformed for an effective seal with fused silica or glass columns Stable to 450°C (842°F)