Hello Does anyone know where we can buy PTFE ferrules used on the gas lines of our Delta isotope instruments? They are used for connecting 1/8" Swagelock fittings but have a 1/16" ID. I have tried most of the chromatography suppliers but they do not keep this unusual size fitting. Regards John John Hill Mass Spectrometry Facility University College London Chemistry Department 20 Gordon St. London WC1H 0AJ Tel: 020 7679 4605 Fax: 020 7679 7451