Rheem Multipostion 4 Ton Coil 21" Wide W/ R-454B Sensor RCFY4821STANMC - Multiposition 4-Ton Coil (21” Width) with R-454B Sensor Key Features: • Aluminum Construction: Features aluminum fins bonded to internally grooved aluminum tubing, enhancing heat transfer efficiency and corrosion... $1,275.00 $867.00 Options