The MRCOOL M14DSR4260A Signature Series Downflow Application Round Adapter Kit is designed for compatible 3.5–5 ton packaged HVAC units. It provides a secure transition between the unit’s discharge opening and round ductwork, helping direct conditioned air efficiently into the connected duct system. The adapter supports downflow installations where round duct connections are required,... https://www.partshnc.com/mrcool-signature-series-14-downflow-adapter-kit-m14dsr4260a