Simpson Door’s Artist Collection features limited-edition doors created by selected artists. The doors are available in Douglas fir, Western hemlock, red oak, knotty alder, maple, cherry, mahogany, and a variety of additional species through Simpson’s Custom Door Manufacturing Facility. The doors are 1-3/4 in. thick, 3 ft. wide and can be specified in heights of 6 ft., 8 in.; 7 ft.; or 8 ft.