The Naval Air Warfare Center, Weapons Division in China Lake, California, intends to sole-source the procurement of one lot of equipment calibration for electrical and mechanical testing instruments. The requirement is specifically set aside for Cornerstone Metrology Service Inc. of Van Nuys, California, as the only vendor deemed capable of performing all calibrations on-site due to prior work. While not a request for competitive proposals, firms believing they can fulfill the requirement may submit a written capability statement for consideration. All responsible sources must be registered in the System for Award Management (SAM) with a notarized letter.