ST to FC single-mode simplex fiber couplers provide a cable to cable or cable to equipment fiber optic connection. We also supply a wide variety of mating sleeves and adapters including special male to female hybrid fiber optic adapters. Product Details ST style to FC style for use in single-mode applications. Dust caps protect against debris and contamination. Free-hanging or panel-mount design. RoHS Compliant. Weight: 4 oz. Dimensions: 2.5” x 8” x 0.5” (5 pack)