These multi-fiber cables from L-com offer up to 8 times the density compared to the same size SC connector. These cables connect equipment in data centers where 10 to 40Gbps ethernet connections are required and are specifically designed to work with 40G QSFP transceivers. Made with a Low Smoke Zero Halogen (LSZH) jacket, it gives off very little smoke and does not produce toxic halogen-based gasses. Type B is a Key Up to Key Up connector configuration and refers to the connector's polarity. This cable comes with alignment pins. These are also fully compatible with US Conec MTP products.