ACLW13517 is one of many in Ape Case’s line of Lightweight “Stackable” Protective Boxes. American made, engineered and designed. Strong, attractive, and lightweight for easy handling. Customers choose to purchase hard cases of the same size because they are uniquely stackable within the same size. Molded-in tabs and slots on the top and bottom of each case hold cases together. The stackable feature allows you to neatly stack several cases one on top of the other for easy and neat stowage. Stacking feature saves space and allows ultimate organization. Lids open a full 180 degrees allowing maximum access. Rear dual hinges and front latches are protected with flanges against impact damage. Box can stand two ways, with top upwards or latch upwards. The measurements of this hard carrying case make this a medium sized case.