Portable External Battery Case Pouch Universal Holder Airsoft for Flashlight Batteries (18650, AA, AAA, and More) Velcro strap for attaching to hand guard, stock of the airsoft AEG,tactical belt or any molle system vest Rugged Durability and Lightweight Strength Dimension:18cm x 7cm x 2.5cm Ship to US mainland via USPS which takes 7-13 days