Detech 401A Electron Multiplier Back Catalog number: 401A Availability: In the manufacturer's stock Price on request - + Recommended 05971-80103 Electron multiplier replacement horn 2 264,18 € G1947-20029 Corona Needle APCI, 1 each 133,62 € G7000-20446 Extractor Lens, 6mm, for 7000B QQQ 1 687,26 €