• Total 20pcs 4AWG 5/16” ring terminals and 20pcs red/black sleeves. 
• 4AWG ring terminals are made of copper with strong durability & excellent conductivity. 
• Incorporate serrations for maximum hardware cohesion with the substrates. 
• Ten red & ten black soft boots for good insulation are included.
• Marine-grade shiny nickel plating to resist corrosion.
• These crimp ring connectors widely used in car, battery, audio system, etc.