Quick Overview Includes battery starter and alternator threaded electrical connection adapters. Starter thread size - M12 x 1.75 Alternator adapter male threads - 1/4-20,Alternator adapter female threads - 1/4-28,5/16-18,M8/1.25 Battery adapter - 3/8-16" Alternator adapter female threads - 1/4-28, 5/16-18, M8/1.25 Battery adapter - 3/8-16 Attributes: GTIN: 00046074168116 Brand Name: AutoMeter Add-On: N/A Extended Information: Country of Origin: China Emissions : Released Life Cycle Status: Electronically Announced Packing Information: Quantity of Each: 1 Package UOM: EA Dimension: 5.25 x 5.25 x 4.5 inches Weight: 1.1625 lb