Alternator 3.15" Dual Foot Saddle K6 Serpentine Pulley Regulator & Temp Sensor - 170A Kit - 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.Features:. 3.15" Dual Foot Saddle. K6 Serpentine Pulley Regulator & Temp Sensor. 170A Kit. 12V