The contractor must provide all labor, materials, and equipment for on-site preventive maintenance of a government-owned Becton Dickinson FACScalibur flow cytometer used for lab research and pre-clinical trials. Services must be performed by factory-trained personnel following the manufacturer’s standard commercial practices. The contract requires three planned preventive maintenance visits during the contract period. No specific budget amount or performance location is mentioned in the description. No submission or non-bid timelines are provided.