The KwiKool CK-60 Ceiling Duct Kit is specifically designed for use with KwiKool's KIB 6021, KIB 6023, and KIB 6043 portable air conditioner units. This high-quality duct kit allows for efficient air distribution and is ideal for enhancing the performance of your 5-ton portable AC system. Made from durable plastic, the CK-60 ensures longevity and reliability in various environments.