This black Neutrik NDM dummy plug can be used to cover unused male XLR inputs, to protect them from dust and dirt.
Cover your unused jack inputs with these dummy plugs. This way your 6.3mm jack inputs are protected from dust and dirt.
Cover your RCA/phono inputs with this black Neutrik dummy plug and protect your connectors from dust and dirt.
Cover your unused XLR female chassis connectors with this useful XLR dummy plug, so dust and dirt cannot get into the XLR inputs.