Your order comes complete with an aluminum alloy pretraining chamber designed to confine the mouse or rat within the Morris water maze. This chamber provides a controlled environment for the rodent to acclimate to the liquid/water/milk apparatus, reducing anxiety and fear responses while enhancing learning capabilities during trials. MazeEngineers provides various configurations for the pretraining chamber, with the most cost-effective option being the 4-sided chamber compatible with the 4 or 5-foot Morris water maze.