Note - latest stock is solid brass Lucas Style Bullet Connectors Hard to find solder Lucas style bullets. If you do any work on your car you'll know how important electrical connections are. These are the correct bullets. Do not use the cheap Far East crimp on versions. They'll let you down and look horrid. Sold in packs of 50 connectors. Connectors are solid brass and measure 0.18" (4.7mm) dia. Designed for 3.00 sq mm cable (USA Gauge 12) - Battery supply, amp meter etc.. See cable chart for details.