Detech 401A Electron Multiplier Back Catalog number: 401A Availability: In the manufacturer's stock Price on request - + Recommended G7000-20446 Extractor Lens, 6mm, for 7000B QQQ 1 684,22 € G1947-20029 Corona Needle APCI, 1 each 132,56 € 05971-20134 Draw out plate 152,55 €