Monster CableLinks Coupler, RCA Female to RCA Female, Dual Inline (MCL DFR) (Discontinued by Manufacturer) Coupler designed to link RCA Female to RCA Female (Dual Inline) 24K gold plated connectors to minimize corrosion Exclusive rugged molded strain relief for lasting protection even after repeated use Features die cast barrel and protective shielding to block out RF and electrical/electromagnetic interference Advanced construction includes high-purity copper content