Connects any ST to MT-RJ fiber device with duplex requirement. This cable is 100% tested and made of premium 62.5/125um multimode fiber cable & ceramic ferrules to support maximum speed. The MT-RJ connector do not utilize alignment pins. (Connectors: MT-RJ to 2 ST Male PC Polish)2RC3267. 3267. Qvs QVS MT-RJ to ST Multimode Fiber Duplex Patch Cord.