Features: Gold-plated/rhodium-plated brass, which ensures ultra-shield and protections, durable. It can effectively prevent dust, oxidation and rust, and also can shielded electromagnetic interference. Connect RCA cap to unused RCA sockets in audional systems, cables, and instruments to eliminate interferences. Fine workmanship, convenient plug and pull, easy connection, not easy to loose. Enhance sound purity, lower noise floor,improved sound stage, spatial separation, suitable for all unused open input/output port of HiFi plugs. Specifications: Material: Metal Color: Gold-plating, Rhodium-plating(optional) Size: Mixed Size Quantity: 3Pieces/set Note: Please allow 0-1cm error due to manual measurement. make sure you do not mind before you order. Please allow slight chromatic aberration due to different display resolutions. Package includes: 1x RCA Cover 1x XLR Male Cover 1x XLR Female Cover