Features: Enhancing your auditory experience with our Auditory Plugs Soldering Connectors For DIY enthusiasts to customize their sound systems with precise auditory configuration. Crafted from gold finish copper, these connectors offer exceptional conductions and durability, ensuring a reliabled and long time connection for HiFi Auditory systems. For sound engineer, electronic hobbyists, and professional auditory equipment repair technicians who demand highly components for their projects. Perfect for use in home theaters, recording studios, stage sound systems, and auditory equipment modifications, providing versatility across various auditory setups. Specifications: Item: Auditory Plugs Soldering Connectors Length:about 51mm/2inch Welding head hole diameters :6.5mm/7.5mm/8.5mm/9.5mm Optional Quantity:4PCS Component: Plastic and Metal Package Includes: 4PCS Auditory Connectors note: Due to the problemsof lighting effects, there will be tolerances in product, please understand. Please allow 0-1cm error due to manual measurment