Citizen Industries Limited offers Open Type Animal Caging System. Citizen Industries Limited manufactures Fan Coil Units and Air-Conditioning Equipment for domestic application. The Open Type Animal Caging System consists of a cage box in plastic or metallic construction and a grill on top. The grill is partially depressed to facilitate the storage of animal food and to house the water bottle. The cages are house in the racks installed in clean rooms. The air circulation within the cage takes place by the natural current of air through the grill.