1/16" Ferrule 0.4 mm ID (Long) Graphite (200/pk)

100% graphite ferrule; upper temperature limit 450 deg. C. Soft; graphite is recommended for use with fused silica and glass. Reusable if not overtightened. For use with standard 1/16 in. Swagelok / Parker type fittings. 0.4 mm ID fits 0.25 mm ID capillary fused silica columns. One piece design requires no back ferrule.