The PolyPhaser FCO-MPMSM1240-GRS0 is a MPO male connector for 12 fiber single mode applications. The PolyPhaser FCO-MPMSM1240-GRS0 is designed for use with a 4.0mm fiber diameter and comes with a green color designator to denote single mode usage. The PolyPhaser FCO-MPMSM1240-GRS0 comes with a short boot for round fiber cables and is made with a familiar push-pull design for easy insertion and removal. PolyPhaser's MPO connectors will provide the dependability and performance required for the most demanding high-speed networks. Order online today!.