Specification:

Items Name: AAA TO AA Battery Adapter.
Color: Transparent.
Material: Plastic.
Dimensions:1.97" x 0.54"/5.01cm x 1.37cm(Length*Diameter);

Features:

1.High quality material,durable clear plastic,metal contact on the
top,which make it work well in many devices
2.They are not only used as AAA to AA battery converters,but also as
protective case for your AAA batteries,be safe and dry to store your batteries
3.Easy to put in and take out your AAA batteries,easy to carry,convenient to use
4.These handy adapters allow you to use a smaller size battery as a larger battery
5.Standard sized and works with all AAA batteries and all devices that
uses AA batteries ,Easy to use.

Package Included:
8 Pcs AAA to AA Battery Adapter Holder, Batteries are not included.