PTFE Sheathed Carbon Fiber Probe 0.75mm ID with 1/4-28 Ratchet Fitting. Suitable for Cetac ASX-200/500/800 and PerkinElmer S20 Series. Swage Tool for Ratchet Connector (50-100-1811, sold separately), allows probe capillary to be cut to a custom length.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 & can be backflushed using the Eluo Nebulizer Cleaner for Glass Concentric Nebulizers (NC9462559, 70-ELUO), or the Eluo HF Nebulizer Cleaner for OpalMist or DuraMist (501907353, 70-ELUO-OPD), & Eluo Adaptor for In-Line Filter (NC0801128, 70-803-1160). The Guardian In-Line Sample Filter is reuseable & can last years.Glass Expansion is ISO 9001:2015 certified by AB Certification, No. AU4501-9001