The FOC Series of optical couplers are used to split 1310 & 1550 nm light sources, with minimal loss. The couplers are 19 inch rack mountable and have FC/APC or SC/APC connectors for superior reflection performance. Features Low Insertion Loss - High Directivity 1310 & 1550nm Dual Window Operation 1 x 2, 3, 4, 6, 8, 16 Models Rack Mount FC/APC & SC/APC Connector Models