My main business Huadong Electronics, Beijing Nuclear Instrument Factory, Beijing Hamamatsu, Hamamatsu photomultiplier tube. The model is complete, example: Hamamatsu: R928, R2228, R580, R268, R166, R1527P, R212, R878, R374, R446, R456, R7154, R105, 1P21, 1P28, 931A, P31B Beijing Hamamatsu: CR131, R184 R192, R105, R110 Huadong Bin Song: GDB221, DB235, DB423, GDB159 GDB152 GDB142 GDB424 Nuclear Instrument Factory: GDB19, GDB20, GDB21, GDB23, GDB28, GDB30, GDB37, GDB38, GDB44, GDB51, GDB52, GDB53 GDB55 cargo loaded brand new price is lower than the factory price! Applicable advance! Quality assurance, low prices and plenty of spot. Huadong Electronics, Beijing Nuclear Instrument Factory, Beijing Hamamatsu, Hamamatsu photomultiplier tube. Performance: spectrometers, chromatography detection advantages: quality assurance, low prices, spot plenty of uses: detecting devices packing: foam sponge carton