Detech 401A Electron Multiplier Back Catalog number: 401A Availability: In the manufacturer's stock Price on request - + Recommended G3170-60172 5975C SST EI 350 Repeller Assembly 28 745,28 Kč G3870-20449 Extraction Lens, 9mm 6 298,56 Kč G3870-20444 Extraction Lens, 3mm 6 816,96 Kč