Powerful starting power at a great price!. Parts Unlimited Heavy-Duty batteries are built to the same exacting specifications and quality-control standards as OEM. Rugged and provide more cranking power over standard batteries. Lead calcium alloy reduces water loss and service by 66% compared to standard batteries. Includes anti-sulfation chemical formulated to reduce sulfate crystal buildup on the battery plates. Reduces self-discharge for longer time between charges. Fiberglass separators improve acid flow. Kit includes battery, pre-measured acid pack, red filler tube, hardware kit and clear vent tube.