Detech 401A Electron Multiplier Back Catalog number: 401A Availability: In the manufacturer's stock Price on request - + Recommended G3170-20430 CI ION Source Chamber 1 281,31 € G3870-20449 Extraction Lens, 9mm 250,49 € G7000-20444 Extractor Lens, 3mm, for 7000B QQQ 258,74 €