The Department of Homeland Security's Federal Protective Service requires a national lease contract for X-ray machines used at security screening stations to detect weapons and prohibited items in federal facilities. The contractor must supply and maintain all specified machines at numerous CONUS and OCONUS locations. The period of performance is 60 months, with services provided via an IDIQ contract with fixed monthly rates and firm-fixed-price task orders. The acquisition will be unrestricted and follow a best-value trade-off approach where technical and non-price factors outweigh price. Contractors must be registered in SAM; the NAICS code is 532490 with a $40 million size standard.