12 Volt Alternator With Pulley, 63 Amp

10 square inch housing surface area --- 6- 1/4" Housing Dia, 2 1/2" pulley Dia, 5/8" belt width --- New, not rebuilt --- Converts 6V to 12V --- Simple 1 wire alternator hook up: Run a wire from alternator through amp gauge to positive side of battery --- Must rev engine to 800 - 850 RPM in order for unit to self excite --- For 12-V negative ground systems