Oceanic Systems Zilla Critter Cage 15 Gallon - 24x12x12 features in the top frame that add strength, ease access and improve safety. The top is escape-resistant mesh, framed in a strong self-aligning frame that opens and closes with a smooth slide every time. A safety catch closes with a positive snap. Pet comfort and health is assured by a recessed hanging space for water bottles, plus wiring ports to neatly channel heater cords.