Miraclekoo 4pcs D Size and 4pcs C Size Battery Spacers for Sanyo Eneloop or Other AA Batteries 4 pack D size spacers and 4 pack C size spacers,batteries not included Materials and processes:ABS raw material injection;Made from high quality, durable plastic Saves hundreds of "D"and "C size batteries from entering landfills Quickly and easily convert AA batteries for use in "D" and "C size battery applications Please note:it fits standard size AA battery,it doesn't fit some rechargeable batteries which is bigger than standard size AA battery