The Naval Surface Warfare Center Crane requires one specific model of 4-inch integrating sphere and controller for delivery by September 30, 2026. The Government intends to issue a sole-source, firm-fixed-price order to Santa Barbara Infrared Inc. of Santa Barbara, California, as the original manufacturer. This procurement supports testing for LCS Toplite Electro-Optics Sensor systems, and the existing lab bench is configured for this specific unit. While the solicitation is issued on a sole-source basis, all responsible sources may submit a capability statement for consideration. Contractors must be registered in the System for Award Management (SAM).