Agilent gas chromatography-mass spectrometry 7890A-5975B, 9-layer new, excellent performance! Imported from the United States with original packaging, suitable for laboratory use. Equipped with an automatic sampler and mass spectrometer detector. The condition is almost brand new and the machine is in good condition. Interested parties are welcome to contact us. If you are satisfied with the goods, we can discuss further! Discounted prices, negotiated!