Detech 401A Electron Multiplier Back Catalog number: 401A Availability: In the manufacturer's stock Price on request - + Recommended G1099-80001 High energy dynode, 5973 series 3 602,91 € G3870-20449 Extraction Lens, 9mm 252,63 € G3870-20444 Extraction Lens, 3mm 272,36 €