Product Selected: 2180 - Choose # of Sides: If the security cage will stand alone, you’ll need 4 sides. 4 sided security cage If attaching the security cage to a single wall or side of another security cage, you’ll need only 3 sides. 3 sided security cage If attaching the security cage to two walls, you’ll need only 2 sides. 2 sided security cage For applications that require only a straight wire partition, choose 1 side. 1 sided security cage