Basic Model : RT18 / RT21 Model Code : RT21M6215** (Internal Display, Recess Handle, Twin Cooling, Auto Ice Maker) RT21M6211** (Internal Display, Recess Handle, Twin Cooling, Twist Ice Maker) RT18M6215** / RT18M6213** (Internal Display, Recess Handle, Twin Cooling, Auto Ice Maker) RT18M6211** (Internal Display, Recess Handle, Twin Cooling, Twist Ice Maker) RT18M6114** (Internal Display, Recess Handle, Twin Cooling, No Ice Maker)