An adaptation of the Elevated Plus Maze, the Elevated Zero Maze is also used in anxiety-related tests. Because the Zero Maze has no center space, it assures uninterrupted exploration between the open and closed sections. The Elevated Zero Maze designed by San Diego Instruments (SDI) offers removable legs for compact storage and easy transport. SDI’s Zero Maze is uniquely designed to be easy to use and clean, as well as highly versatile.