High Value Pure Copper(Not Alloy) UHF Male PL259 to UHF Male Double Straight Coupling Adapter RF Connector Pure brass with Great connectivity.(Not Alloy) RF Impedance 50 Ohms Frequency Range 0-11 GHz Use Best Flame retardancy material. 5-12 Businese day delivery to USA Address if Fullfilled by seller. Package include item:1pcs