NRG Edison | AC Wall Plug
-POLISHED HIGH-TENSION SURFACES WITH HANGING-SILVER PLATING
-SIGNIFICANTLY GREATER METAL MASS FOR OPTIMUM CURRENT DELIVERY
-BERYLLIUM-COPPER BASE METAL
Provides superior spring tension and long-lasting, low-impedance AC power connections. Typical materials such as brass, or even high-purity copper aided by spring and wedge devices, simply cannot equal the unparalleled retention strength of high-mass beryllium-copper.