Our small Category 5/5e Line Coupler (Patented) and Category 6/6A is nicely designed to link two C5/C5e/6/6A patch cord together. Comes with T568A and T568B wiring and complies fully with EIA/TIA TSB 67 specification for attenuation, return loss, and near-end-crosstalk for any pair combination up to 100 MHz.