Couplers are available with bare fiber, 900um buffered, 3mm jacketed cable. They are available in premium and standard grades to match your budget and performance requirements. Single window SM Couplers can be ordered to operate in either the 1310nm window or the 1550nm window. Dual window SM couplers operate in both the 1310nm and the 1550nm windows. All couplers can be connectorised as per your needs. Available in coupling ratio of 50:50, 70:30, 90:10, 80:20, 60:40 or as per your requirement.