This Jackson Cable Connector Model No QNBM-4-BP Item No 0704-0030 is a reliable choice for connecting 3/0 and 4/0 cables. Designed for use with Whip Lead Connectors, this connector ensures a secure and efficient connection for your welding equipment. The connector is branded with the reputable name of Jackson, known for their high-quality welding products, making it a great addition to any welder’s toolkit.