Amazon.com: 10pcs 4 Gauge 4 AWG x 3/8” Pure Copper Cable Lug Terminal Ring Connectors with Dual Wall Adhesive Lined Red + Black Heat Shrink Tubing – by WNI : Industrial & Scientific
100 Pcs High Temperature Non-Insulated 4 Gauge AWG 3/8" Stud Wire Ring Terminal | eBay