SonicWave(?) connectors from Impact Acoustics(?) are machined from brass and 24K gold plated for years of operation 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 is engineered to provide better leverage while inserting or removing the connectors. Ten pieces per package.