Polarization maintaining (PM) patch cord / jumper leads are built with polarization maintaining panda fiber and connectorise using FC/UPC, FC/APC, SC/UPC, SC/APC and LC connectors. FC connectors can be supplied with wide key (2.14mm, N type) or narrow key (2.02mm, R key) width. Patchcords can be supplied in 250um bare fiber, 900um buffered fiber or 3mm cable. PMP features low insertion loss, high extinction ratio and high return loss. The slow or fast axis can be aligned to the connector key.