PTFE Sheathed Carbon Fiber Probe 0.5mm ID. Suitable for Cetac ASX-200/500/800 and PerkinElmer S20 Series Autosamplers.Replacement of autosampler probe is recommended about every 6 months to a year. This will ensure you have unrestricted sample flow. If clogs within probes or nebulizers occur, consider using the Guardian In-Line Sample Filter (P/N NC0897716, 70-803-1108). The Guardian In-Line Sample Filter is spliced into the autosampler probe capillary and can be backflushed using the Eluo Nebulizer Cleaner for Glass Concentric Nebulizers (P/N NC9462559, 70-ELUO), or the Eluo HF Nebulizer Cleaner for OpalMist or DuraMist (P/N 501907353, 70-ELUO-OPD), and Eluo Adaptor for In-Line Filter (P/N NC0801128, 70-803-1160). The Guardian In-Line Sample Filter is reuseable and can last years.Glass Expansion is ISO 9001:2015 certified by AB Certification, No. AU4501-9001