Special lead alloys, reduces self discharge. Maximizes starting power even after 4 months of storage. Ethylene polypropylene containers: Resist damage from gas and petroleum-base solvents. High impact characteristics, reduce breakage, withstand vibration.Transparent for easy check of electrolyte level. Shipped with acid pack. These batteries are used in motorcycle and lawn and garden applications. No.12N12A-4A-1 is used by Honda, Kawasaki and Yamaha with engines from 250cc to 750cc. No.12N14-3A is also used by motorcycle manufacturers with engines ranging from 500cc to 1100cc. No.12N9-4B-1 is also used for lawn and garden small engines. Rental.