This crank-style window handle fits all Mack R, RB, RD, and RW model trucks, mounting on the interior door panel to operate the manual window regulator. It is sold individually and is built as an aftermarket replacement for the cab. Turning the handle raises or lowers the window as needed.Interchanges:Mack 51QS21FHD-4480FeaturesFits all Mack R/RB/RD/RW model trucksSold pack: 1 eachCab component categoryTech SpecsSell Pack: 1 EachFitment: All Mack R/RB/RD/RW ModelsUsed in this Truck Cab modelMack Door & Window Parts & Diagrams