Product Name : Battery Case Fit for : AAA to AA Cell Converter Dimension : 50 x 13mm/ 2.0 inch x 0.5 inch (L x W x T) Material : Plastic Color : Clear White Battery Holder Converter Adaptor Size AAA to AA. Battery Holder Converter: Switch size AAA battery to AA battery. Battery AAA to AA is One piece for one piece. Nothing complicated, just stick the AAA battery in the converter and it's the same as a AA battery. AAA to AA Battery Holder is a gadget to keep close at hand, at home, at the office, at the campsite, etc. Net Weight : 45g Package Content : 12 x Battery Cases. Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.