ETI Research Brio Spade (par)The ETI Research Brio Spade Connector is made from Tellurium Copper and Rhodium plated for not only superior conductivity but long lasting durability to stand up to the rigors of being fastened and unfastened time after time. CONDUCTOR Rhodium Plated Tellurium Copper HOUSING Brass (Black Finish) This combination of high quality materials and Rhodium plating adds up to a superior audio connector designed to accurately transfer an audio with crystal