Pre-formed and ready to install. Grill screen includes the curved bolt holes, for easier installation . Left and right sides are the same, but they are sold individually. Each tractor requires 2 pieces, one for left side, another for right side. Screen must be trimmed for final fitting. Screen measures 17-1/8" tall and 12-1/16" total wrap around width. Fitsmodel B (s/n 60,000 and up) and H. FIT TO TRACTOR BEFORE PAINTING