The contractor must provide all labor, materials, and equipment to maintain and perform preventive maintenance on a Leica confocal/multiphoton microscope system used by the NIH’s National Cancer Institute for intravital microscopy research. Services will be performed on-site at the NIH facility, with one planned preventive maintenance session required per period of performance. The maintenance must be carried out by factory-trained personnel following the manufacturer’s standard procedures, including cleaning, calibration, and operational testing. This is a severable firm fixed-price purchase order, though no specific budget amount is provided. The contract aims to minimize disruption to the core’s research operations, which depend on continuous and reliable use of the microscope system.