Diamond Roll-Up Door Inc. manufactures under the brand name "Dover Roller Shutters" aluminum roll-up doors for: Commercial VehiclesEmergency Services VehiclesFire EnginesArchitectural DoorsPoint of purchase display stands or kiosksCompartment SecurityTool storage boxesCounter ShuttersDiamond has a large range of product options that can be engineered to suit your specific application. No aluminum roll-up door job is too small or too large for us to handle. Diamond also manufactures in the US the Dover Nyloy 30 product, originally manufactured in England. Diamond can promptly supply replacement parts for Nyloy 30 doors supplied on a wide range of fire engines used across the US