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. BATTERY YHD412