This is a firm-fixed-price purchase order awarded by the Department of Energy's National Energy Technology Laboratory (NETL) to Carl Zeiss Microscopy, LLC for the repair of a MicroXCT-400 micro CT scanner. The contract has a ceiling value of $80,413.50 and an ultimate completion date of October 15, 2021. The award was made on a sole-source basis as NETL determined that only Zeiss factory-trained field service engineers employed by Carl Zeiss Microscopy are capable of servicing this specialized equipment without violating any warranties. No set-aside was used for this award. Carl Zeiss Microscopy is an international manufacturer and distributor of microscopes, microscopy equipment, and related services, and has been awarded numerous previous federal contracts to provide specialized microscopes, electron microscopes, and maintenance services to agencies such as the Department of Health and Human Services, Department of Veterans Affairs, and Department of Defense.