we are offering qsfp+ twinax copper cable. eolq-40g-clb-x copper qsfp+ cables is 40gbase qsfp+ to qsfp+ direct-attach cable and qsfp+ to four sfp+ cables. they are based on the qsfp+ multi source agreement (msa), and offer customers a wide variety of high-density 40 gigabit ethernet connectivity options for data center, high-performance computing networks, enterprise core and distribution layers, and service provider transport applications.features:fully compatible with ieee802.3ba and infiniband qdr specificationsallows for 10gbs per channel transmission; aggregate of 40 gbs total bandwidthrobust diecast covers for superior emi shielding effectivenesseeprom for cable signature & system communicationsactively equalized cables enable longer cable lengths or the use of smaller cable diameters for shorter cable lengths30 awg cable sizes available100 ohm differential impedance systemoptimized pcb interface board to minimize crosstalk and insertion losslower power consumption< 1.5wtemperature range: 0 70crohs6 compatibleapplication:serversnetworked storage systemsroutersexternal storage systemshigh performance computing (hpc) applicationsdata center networking