SureGrip100 BFA/Banana Connectors Beryllium-copper is stronger more conductive and better sounding than normal phosphor-bronze connectors Direct-silver plating looks dull because there is no distortion-causing shiny nickel layer underneath. It is optimized for sound. Cold-weld system for an ideal connection better sounding than solder What's in the Box: SureGrip100 BFA/Banana Connectors - 8-Pack Specifications Fits up to 9 AWG speaker cables