SonicWave(?) connectors from Impact Acoustics(?) are machined from brass and are 24K gold-plated for years of operation that's free from oxidation. Proper connector geometry ensures that the 75ohm impedance is maintained across the connector for maximum signal transfer. These connectors are designed to provide a snug, but not overly-tight, fit when mating with your audio/video device?s input and output jacks. The embossed textured grip on the metal shell provides better leverage for insertion or removal of the connectors. Ten pieces per package.