SPI Supplies will be closed on November 26th & 27th in observance of Thanksgiving.
Orders placed during this time will be processed on Monday, November 30th.
Returning customer? Request an account for our new website on the contact form.
SPI Microspheres are available for calibrating SEM, TEM, LM, confocal, SPM, just about any and every imaginable kind of microscope. All products have been calibrated against NIST traceable standards.