Balmar Alternator 3.15in Dual Foot Saddle J10 Serpentine Pulley - 170A - 12V One Size. 15" Dual Foot Saddle J10 Serpentine Pulley - 170A - 12VBalmar offers a wide range of alternator power upgrades designed specifically for marine industry applications. Balmar installs high reliability bearings robust rectifier diodes and improved heat-sinking capabilities on all our alternators to ensure improved system reliability combined with increased charging power. Specifications for Balmar Alternator 3.15in Dual Foot Saddle J10 Serpentine Pulley: Manufacturer: Balmar Color: Black Amperage: 170 amps Voltage: 12 volts Features of Balmar Alternator 3.15" Dual Foot Saddle J10 Serpentine Pulley 3.15" Dual Foot Saddle J10 Serpentine Pulley 170A 12V Package Contents: Balmar Alternator 3.15" Dual Foot Saddle J10 Serpentine Pulley Balmar XT-DF-170-J10: Alternator 3.15in Dual Foot Saddle J10 Serpentine Pulley - 170A - 12V One Size