Ammo Box Features All Berry's Ammo Boxes are made from high impact polypropylene for increased strength against cracking chipping warping expansion or contraction. Our 20-gauge 25 round boxes feature our traditional living hinge design providing a translucent look and an easy-to-open lid. They are stackable they carry a lifetime warranty and they are made in the USA. Ammo Box Specifications Available in Blue color 12-gauge 3 Shotshell Box Cell Dimensions: 2.81" OAL x .69" Will carry a 12-gauge shotshell up to 3