Balmar 621 Series Alternator - Spindle MountSingle Foot - 100A - 12V One Size. Hunter Engineering Company understands that alternators need to be robust in order to provide the necessary power output to keep your devices running reliably and efficiently. That's why they made the Balmar 621 Alternator. Hunter Engineering made alternators with heavy cast iron housings reliable bearings and innovative designs. A standard mounting pattern with a separate motor grounding lug allows easy replacement on the spindle. The all-stainless steel engineered housing minimizes bearing wear snags and corrosion and makes the Balmar 621 Alternator a solid choice for demanding industrial applications. Hunter believes in providing only the highest quality alternators to the maritime and industrial markets and you can trust that the Balmar 621 Alternator will meet your needs. Specifications for Balmar 621 Series Alternator - Spindle MountSingle Foot - 100A - 12V: Manufacturer: Balmar Color: Black/Silver Included Accessories: None Amperage: 100 amps Package Contents: Balmar 621 Series Alternator Balmar 621-100-SV: 621 Series Alternator - Spindle MountSingle Foot - 100A - 12V One Size