Viborg Audiocrast 2X Male XLR Dust Caps, XLR Socket Protective Cover, Noise Reducing Caps, PTFE Insulation, Gold-Plating, Noise Stopper for XLR Chassis

Well made caps that fit perfectly on my headphone amp. I swear that the noise flor on my headphones is a little lower but that may just be in my head. These are quality made and solid, good stuff.