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SPI Supplies: Manufacturer and distributor of sample preparation equipment, consumable supplies and chemicals for electron, light and scanning probe microscope laboratories. Instrumentation includes our Osmium Plasma Coater, RoHS compliant sputter/carbon coaters and our new Solid State PlasmaPrep. Sample substrates include perforated silicon nitride membrane windows for TEM as well as HOPG and mica for SPM. See our line of desiccating cabinets, liquid nitrogen dewers, and vacuum grease on our website www.2spi.com