Cover all the unused RCA inputs in your system with the RCA caps and keep this noise from getting into your components. Our RCA caps slide right over unused RCA jacks and will provide both sonic and environmental protection. This Noise-Stopper caps are grounding plugs that help you block out this unwanted noise. Just slip a cap over the open inputs on the back of your Hi Fi gears. You will aware Noise-Stopper caps lower the noise floor and allow your equipment to perform to it's fullest potential. For elimination of electromagnetic noise pick-up from unused RCA connectors in Audio vedio Equipment protector dust proof. Gold Plated brass to ensure ultra shield and protection. Shield against RFI, EMI dust and corrosion. Suitable for either shorting or non-shorting application. color: Gold Material: pure copper + gold plating color: Silver Material: Pure copper + rhodium plating<br><br>Package Contents: 12 x RCA Jack Socket Protect Cover Caps Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.