This standard height chamber is recommended for most rodent work. Both end walls are identical with three sturdy aluminum channels designed to securely hold any modular component. The unique top design with a clear polycarbonate center and two hinged stainless steel flap makes changing modules quick and easy, while holding them securely in place. This unit includes a door and rear panel of 0.22" (0.6 cm) clear polycarbonate, and a base of white polypropylene.