2pcs Coaxial Adapter, SMA Female Jack / TNC Female Jack coupling nut Connector Pure brass with Great connectivity.(Not Alloy) Allows interconnection of devices with SMA and TNC male interfaces Nickel plated body for enhanced corrosion resistance.50ohm Impedance Gold plated center contact for reduced signal loss 5-12 Businese day delivery to USA Address if Fullfilled by seller. Handy device to have on hand to solve your interconnection problems