The L-com FOA-STSM1-MC0O is a fiber optic economy coupler. The FOA-STSM1-MC0O has ST connectors for simplex single mode fiber. It features zinc alloy body with ceramic sleeve and is for mounting in a round thru-hole. The L-com FOA-STSM1-MC0O is one of thousands of fiber optic products in-stock and ready to ship.