Our revolutionary Generation 3 doors feature 1-1/8" thick, fully gasketed door panels, Generation 3 doors feature a one-of-a-kind pivot hinge system that ensures door panels always return to center. Our Generation 3 doors are ideal in areas with negative air pressure, and can handle medium forklift traffic. FOB Shipping Point. Available in Red, Blue, Green, Brown, Gary, Beige, Black and White.