InstallGear 4 Gauge AWG Crimp Ring Terminals Connectors - 20-Pack (10 Positive, 10 Negative) 20 pack of 4 gauge crimp ring terminals (10 positive, 10 negative) Colored rubber boots (for wire end protection and polarity identification) Gold plated finish (for maximum conductivity) Wire input size: 5/16" Ring size: 7/16"