The FOA-001A is a stainless steel ST-to-ST fiber optic coupler featuring a ceramic alignment sleeve suitable for single-mode applications. This simplex metal coupler provides multiple mounting options for 3/8-inch diameter holes and standard rectangular panels. It supports both PC and UPC style fiber connectors, ensuring versatility for various fiber optic and communication applications. The durable metal body offers reliable performance in fiber optics, networking, RF communications, and security systems.