Cover all the unused RCA inputs in your system with RCA caps to prevent noise from entering your components. These caps slide over unused RCA jacks and provide both sonic and environmental protection. These noise suppression caps help block unwanted interference. Simply place a cap over the open inputs on the back of your audio equipment. This can reduce the noise floor and allow your system to perform at its best. Designed to minimize electromagnetic noise pickup from unused RCA connectors in audio and video equipment. Provides dustproof protection. Constructed with gold-plated brass for excellent shielding. Protects against RFI, EMI, dust, and corrosion. Suitable for both shorting and non-shorting applications. Color: Gold Material: Pure copper + gold plating Color: Silver Material: Pure copper + rhodium plating Package Contents: 12 x RCA Jack Socket Protective Cover Caps Note: Only the items listed above are included. Other products are not included. Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.